Sapphire Value, Price, and Jewelry Information

Triangle mixed-cut sapphire, medium dark blue, 2.10 cts, 7.4 x 7.3 mm, Sri Lanka. © The Gem Trader. Used with permission.

Sapphire

Few gems have held our attention over millennia as well as sapphire. The pure blue colors and excellent durability of this gem-quality member of the corundum family make for an exceptional gemstone. However, not all sapphires are blue. The September birthstone comes in every color of the rainbow. Except red.

Sapphire Value

Color is the most important element in estimating the value of blue sapphire. Although hue counts, the closer to a pure blue the better, saturation is more important. Top sapphires reach vivid saturation. (Many sapphires on the market are actually grayish). Tone is also an important consideration. Dark sapphires are abundant and never reach very high values. (Of course, the same can be said for all dark gems: too dark and they’ll only be moderately valuable). The pictures below are a rough illustration of differences in blue sapphire saturation.

Vivid Saturation Strong Saturation Slightly Grayish Grayish

After blue, pink and pink-orange padparadscha colors command the highest prices.

For more information on sapphire quality factors, consult our sapphire buying guide, blue sapphire appraisal guide, and sapphire engagement ring guide.

purplish pink sapphire - Sri Lanka

Purplish pink sapphire, round brilliant cut, 1.63 cts, 6.6 mm, Sri Lanka. © The Gem Trader. Used with permission.

The International Gem Society (IGS) has a list of businesses offering gemstone appraisal services.

Sapphire Value via Gem Price Guide

Kashmir Sapphire

Certified origin. Untreated material. Average brilliancy of 40 to 60%. Add to 20% or deduct to 10% for other cutting. Prices for ovals and cushions. Add 8% to 10% for rounds and pears. Add 10% to 20% for emeralds and marquis.
Top Grade: vB 5/6, 6/6. B 5/6, 6/6.
Top Grade 1 to 2 carats 2 to 3 carats 3 to 4 carats 4 carats plus
VVS ,000 to ,650/ct ,000 to ,000/ct ,000 to ,500/ct to ,000/ct
VS/SI ,000 to ,000/ct ,000 to ,700/ct ,000 to ,000/ct to ,000/ct
SI/I ,000 to ,000/ct ,000 to 24,600/ct ,000 to 27,600/ct to ,000/ct
Very Good Grade: V 4/6, 5/6, 6/5. bV 5/6, 6/6; vB 5/5, 4/6, 6/5.
Very Good Grade 1 to 2 carats 2 to 3 carats 3 to 4 carats 4 carats plus
VVS ,000 to ,300/ct ,600 to ,400/ct ,000 to ,000/ct to ,000/ct
VS/SI to ,100/ct ,000 to ,700/ct ,000 to ,000/ct to ,500/ct
SI/I to ,300/ct ,000 to ,000/ct ,400 to ,600/ct to ,500/ct
Good Grade: V 4/5, 5/4, 5/5, 6/4, 6/5, 7/5; bV 4/5, 4/6, 5/4, 5/5, 5/4, 4/5; vB 3/5, 4/4, 6/3, 7/5, 5/4, 4/5; B 3/5, 4/4, 6/3, 7/5, 6/4, 5/4, 4/5.
Good Grade 1 to 2 carats 2 to 3 carats 3 to 4 carats 4 carats plus
VVS to ,200/ct to ,700/ct ,000 to ,000/ct to ,000/ct
VS/SI to /ct to ,200/ct ,000 to ,000/ct to ,000/ct
SI/I to /ct to ,500/ct ,000 to ,000/ct to ,900/ct
Fair Grade: V 3/4, 3/5, 4/4, 4/3, 5/3, 6/3, 7/4; bV 3/5, 4/4, 5/3, 6/3, 7/4, 7/5; vB 3/4, 4/3, 7/4, 6/2, 5/3; B 3/4, 4/3, 7/4 6/2, 5/2, 5/3.
Fair Grade 1 to 2 carats 2 to 3 carats 3 to 4 carats 4 carats plus
VVS to /ct to ,200/ct to ,500/ct to ,500/ct
VS/SI to /ct to /ct to ,000/ct to ,000/ct
SI/I to /ct to /ct to ,500/ct to ,700/ct

Other Blue Sapphires

Heat treated material. Average brilliancy of 40% to 60%. Add to 20% or deduct to 10% for other cutting. Prices for ovals and cushions. Add 8% to 10% for rounds and pears. Add 10% to 20% for emeralds and marquis. Note: If certified Burmese and untreated, add 50%, except fair or lower grades. Typically, mid-quality untreated blue sapphire will sell for 20-30% more than a treated stone of the same quality. Top-quality unheated stones could get a premium of 50% or higher, especially if they're large.
Top Grade: vB 5/6, 6/6; B 5/6, 6/6.
Top Grade 1 to 2 carats 2 to 3 carats 3 to 4 carats 4 carats plus
VVS to /ct to /ct to /ct to ,500/ct
VS/SI to /ct to /ct to /ct /ct
SI/I to /ct to /ct to /ct /ct
Very Good Grade: V 4/6, 5/5, 6/6; bV 5/6, 6/7; vB 5/5, 4/6, 6/5; B 4/6, 5/5, 6/5; vslgB 4/6, 5/6, 6/6.
Very Good Grade .5 to .75 carat .75 to 1 carat 1 to 2 carats 2 carats plus
VVS to /ct to /ct to /ct to /ct
VS/SI to /ct to /ct to /ct to /ct
SI/I to /ct to /ct to /ct to /ct
Good Grade: V 4/5, 5/4, 5/5, 6/4, 6/5, 7/5; bV 4/5, 4/6, 5/4, 5/5, 6/4, 6/5; vB 3/5, 4/4, 6/3, 7/5, 5/4, 4/5; B 3/5, 4/4, 6/3, 7/5, 6/4, 6/4, 5/4, 4/5; vslgB 7/5, 5/4, 6/4, 4/5, 6/5, 5/5; gB 4/5, 5/5, 6/5.
Good Grade .5 to .75 carat .75 to 1 carat 1 to 2 carats 2 carats plus
VVS to /ct to /ct to /ct to /ct
VS/SI to /ct to /ct to /ct to /ct
SI/I to /ct to /ct to /ct to /ct
Fair Grade: V 3/4, 3/5, 4/3, 4/4, 5/3, 6/3, 7/4; bV 3/5, 4/4, 5/3, 6/3, 7/4, 7/5; vB 3/4, 4/3, 6/2, 7/4, 5/3; B 3/4, 4/3, 7/4, 6/2, 5/2, 5/3; vslgB 3/4, 3/5, 4/3, 4/4, 5/3, 6/3, 7/4; gB 3/5, 4/4, 5/3, 5/4, 6/3, 6/4, 7/4; vstgB 4/4, 5/4, 6/4.
Fair Grade .5 to .75 carat .75 to 1 carat 1 to 2 carats 2 carats plus
VVS to /ct to /ct to /ct to /ct
VS/SI to /ct to /ct to /ct to /ct
SI/I to /ct to /ct to /ct to /ct

Fancy Sapphires

Average brilliancy of 30% to 40%. Add to 20% or deduct to 10% for other cutting. Prices for ovals and cushions. Add 7% to 10% for rounds, pears and marquis. Add 15% to 30% for emerald cuts.

Pink Sapphire

Top Color: stpR 3/6, 4/6; RP 4/6; rP 4/6
No trade data available
Very Good Color: slpR 4/6; stpR 4/5; RP 3/5, 4/4, 4/5; rP 3/5, 4/4, 4/5; P 4/5.
Very Good Color .5 to .75 carat .75 to 1 carat 1 to 2 carats 2 carats plus
VVS to /ct to /ct to /ct to ,500/ct
VS/SI to /ct to /ct to /ct to /ct
SI/I to /ct to /ct to /ct to /ct
Good Color: slpR 3/5, 4/4, 4/5; stpR 3/4, 3/5, 4/4; RP 3/4, 4/3; rP 3/4, 4/3; P 3/4, 4/4.
Good Color .5 to .75 carat .75 to 1 carat 1 to 2 carats 2 carats plus
VVS to /ct to /ct to /ct to /ct
VS/SI to /ct to /ct to /ct to /ct
SI/I to /ct to /ct to /ct to /ct
Fair Color: slpR 3/3, 4/3; stpR 3/4, 4/3; RP 2/3, 3/3; rP 2/3, 3/3; P 3/, 4/3.
Fair Color .75 to 1 carat 1 to 2 carats 2 carats plus
VVS to /ct to /ct to /ct
VS/SI to /ct to /ct to /ct
SI/I to /ct to /ct to /ct

Yellow Sapphire

Top Color: Y 3/5; oY 3/5. Very Good Color: Y 3/4; oY 3/4. Good Color: Y 3/3, 4/4; oY 3/3, 4/4. Fair Color: Y 2/3, 4/3; oY 2/3, 4/3.
Yellow Sapphire to 2 carats 2 carats plus
Top Color to /ct to /ct
Very Good Color to /ct to /ct
Good Color to /ct to /ct
Fair Color to /ct to /ct

Green Sapphire

Top Color: vslbG 6/3, bG 6/3, G 6/3. Very Good Color: BG 6/3, vstbG 6/2, 5/3, 6/2; bG 4/3, 5/3, 6/3; vslbG 4/3, 5/3, 6/2; G 5/3, 7/3; slyG 5/3, 6/3; yG 6/3. Good Color: BG 4/3, 5/3, 6/2; vstbG 4/3, 5/3, 7/3; bG 4/2, 5/2, 7/3, G 5/2,6/2; slyG 5/2, 6/2, 7/3; yG 5/3, 6/2, 7/3; styG 5/3, 6/3; styG 5/3, 6/3. Fair Color: BG 4/2, 5/2; vstbG 4/2, 7/2; bG 3/2, 7/2; vslbG 7/2; G 4/2, 7/2; slyG 4/2, 7/2; yG 5/2, 7/3; styG 5/2, 6/2.
Green Sapphire to 1 carat 1 carat plus
Top Color to /ct to /ct
Very Good Color to /ct to /ct
Good Color to /ct to /ct
Fair Color to /ct to /ct

Purple Sapphire

Top Color: RP 6/6, 5/6; rP 6/6; P 6/6. Very Good Color: stpR 5/5, 6/5; RP 5/5, 6/5, 7/5; rP 5/6, 6/5; P 5/6, 6/5; bP 5/6, 6/5. Good Color: slpR 5/3, 6/3; stpR 5/4, 6/4, 7/4; RP 5/4, 6/3, 6/4, 7/4; rP 5/4, 5/5, 6/4, 7/5; P 5/4, 5/5, 6/4, 7/5; bP 4/5, 4/6, 5/5. Fair Color: .
Purple Sapphire to 2 carats 2 carats plus
Top Color to /ct to /ct
Very Good Color to /ct to /ct
Good Color to /ct to /ct
Fair Color to /ct to /ct

Other Sapphires

White Sapphire .5 to 3 carats 3 to 5 carats 5 to 15 carats
to /ct to /ct to /ct
Color Change Sapphire .5 to 1 carat 1 to 7 carats
to /ct to /ct
Blue Cabochons .5 to 1 carat 1 to 7 carats
to /ct to /ct
Star Sapphire .5 to 1 carat 1 to 5 carats
Blue to /ct to /ct
Fancy Colors to /ct to /ct
Black to /ct to /ct

Sapphire Information

Data Value
Name Sapphire
Is a Variety of Corundum
Varieties Color Change Sapphire, Padparadscha Sapphire, Star Sapphire
Crystallography Hexagonal (trigonal). Crystals common, often barrel-shaped, prisms with flat ends, sometimes bipyramidal; also massive, granular, in rolled pebbles.
Refractive Index 1.757-1.779
Colors All non-red corundum is considered sapphire. Colorless, white, gray, blue, blue-green, green, violet, purple, orange, yellow, yellow-green, brown, golden amber, peachy pink, pink, black. May show color zoning.
Luster Vitreous to adamantine
Polish Luster Vitreous to subadamantine
Fracture Luster Vitreous
Hardness 9
Wearability Excellent
Fracture Conchoidal. Frequent parting.
Specific Gravity 3.99–4.10; usually near 4.0
Birefringence 0.008-0.009
Cleavage None
Dispersion 0.018
Heat Sensitivity No
Luminescence See "Identifying Characteristics" below.
Luminescence Present Yes
Luminescence Type Fluorescent, UV-Long, UV-Short, X-ray Colors
Enhancements Heat treatment: common; diffusion treatment (placing a thin blue coating on colorless sapphire): occasional; irradiation (turns colorless gems yellow, orange, or light blue): rare.
Typical Treatments Heat Treatment, Infusion/Impregnation, Lattice Diffusion
Special Care Instructions None
Transparency Transparent to opaque
Absorption Spectrum See "Identifying Characteristics" below.
Phenomena Asterism, color change, chatoyancy.
Birthstone September
Formula Al2O3 + Fe, Ti, Cr, and other trace elements
Pleochroism Very pronounced.
  • Blue sapphire: intense violet-blue/blue-green
  • Green sapphire: intense green/yellow-green
  • Orange sapphire: yellow-brown or orange/colorless
  • Yellow sapphire: medium yellow/pale yellow
  • Purple sapphire: violet/orange
  • Brownish-orange sapphire: brownish orange/greenish
  • Padparadscha sapphire: orange-yellow/yellowish orange
Optics RI: o = 1.757-1.770; e = 1.765-1.779 (usually 1.760, 1.768); Uniaxial (-).
Optic Sign Uniaxial -
Etymology From the Latin sapphirus for blue.
Occurrence Metamorphosed crystalline limestones and dolomites, as well as other metamorphic rock types such as gneiss and schist. Also, igneous rocks such as granite and nepheline syenite.
Inclusions See "Identifying Characteristics" below.
faceted sapphires

Faceted sapphire gemstones (and a few rubies) from around the world, from 0.5 to 5 cts. Photo © Joel E. Arem, PhD, FGA. Used with permission.

Comments

All red, gem-quality corundum gems are considered rubies. All other colors of gem-quality corundum are considered sapphires. On the market, blue sapphires are usually simply called sapphires, while sapphires of other colors are commonly specified as yellow sapphires, pink sapphires, etc, and are collectively known as “fancy sapphires.” However, when discussing the physical and optical properties of sapphires, the term “sapphire” applies to all sapphires regardless of color.

rough sapphires

Rough sapphires: purple and pink from Madagascar, blue from Kashmir, chartreuse and white from Montana, USA. © Dan Stair Custom Gemstones. Used with permission.

Sapphires get their extraordinary colors from trace elements such as iron, titanium, chromium, and others. Traces of vanadium may cause color change in some sapphires. These sapphires show one color in daylight or fluorescent light and another in incandescent light.

This custom-cut, 1.33-ct sapphire from the Umba Valley in Tanzania shows a violet-blue color in daylight. However, in incandescent light, it shows a deep purple flash. © The Gem Trader. Used with permission.

Pink Sapphire or Ruby?

There is some disagreement about the distinction between pink sapphires and rubies. Some authorities classify only corundum gems with a dominant red hue as ruby. Others consider any red corundum, including pink, which is a light tone of red, to be ruby.

pink sapphires

Pink sapphires. Photo by Mauro Cateb. Licensed under CC By 2.0.

What is a Padparadscha Sapphire?

Debates over colors and definitions extend to padparadscha sapphires, too. Subjective descriptions of these “lotus-colored” sapphires include “sunset,” “peach,” and “salmon.” The preferred color qualities range from a light to medium-tone orange-pink to pink with a slight orange hue to orange with a slight pinkish hue to a more deeply saturated orange-pink. These preferences also vary between consumers from Eastern and Western countries.

padparadscha sapphire - Rock Creek, Montana

Padparadscha sapphire, 0.89 cts, Rock Creek, Montana. Photo © Joel E. Arem, PhD, FGA. Used with permission.

The Lore and Lure of Sapphires

For centuries, sapphire has been popularly associated with royalty and said to protect against poison and fraud. Star sapphires have also been associated with the power to divine the future. However, ancient references to sapphires may actually refer to lapis lazuli, another striking but gemologically distinct blue stone.

Learn more about the myths and romance of sapphires in our symbolism article.

gold, pearl, and sapphire earrings - Byzantine Empire

Identifying the actual gem species behind ancient gem names can prove challenging. Although the term “hyacinth” or “jacinth” is frequently associated with reddish or orange brown varieties of gemstones like zircons and garnets, historically, the term also referred to blue gemstones. So-called hyacinths, such as the blue sapphires in these earrings, were popular in Byzantine jewelry. Gold earrings with pearls and blue sapphires, Byzantine Empire, 6th-7th century CE. Gift of J. Pierpont Morgan, 1917. Metropolitan Museum of Art, New York. Public Domain.

Kashmir Sapphires

Kashmir sapphire

The most highly prized sapphires come from Kashmir. High in the Himalayas, these stones could only be found a few months out of the year. However, these sources are now exhausted.

Kashmir sapphires are special. In addition to their fine color, what sets them apart from all others is their very fine silk inclusions. These scatter light and give the stone a soft, velvety appearance. It creates a glow that, at the same time, minimizes extinction. This effect is only seen in one other stone: Myanmar ruby.

Kashmir sapphires have a price structure all their own. Many sapphires are said to have “Kashmir color” or are called Kashmir due to their color. However, simply having fine color isn’t enough to prove origin.

Fortunately, Kashmir sapphires have a variety of features that make them easy to distinguish. Kashmir is the only place where tourmaline and corundum are found together. Although you’ll rarely see tourmaline inclusions in a finished sapphire, it often shows up on the rough or associated matrix.

Silk Inclusions

The most visible feature of Kashmir sapphires is their silk. It’s much finer than that seen in other sapphires. Its appearance is usually muted, rather than sharp and clear. This is what is known as being “velvety.” The first picture below shows the traditional fine, or velvety, silk as well as a “streamer” effect. (However, in this concentration, it will affect the clarity of the gem). In the second picture, the silk is much lighter but still soft in texture. Occasionally where the silk crosses, you’ll get “snowflakes” as seen in the third picture.

Left, traditional velvety silk inclusions. Center, lighter silk. Right, “snow flake” silk.

Left, traditional velvety silk inclusions. Center, lighter silk. Right, “snowflake” silk.

Silk can take on other distinctive appearances. The silk pattern in the picture below left is called “leather.” The sideways markings are what distinguish leather. The picture below right shows parallel streamers. When alone like this, they’re often called “comet tails.”

Left, leather silk pattern. Right, comet tail silk pattern

Left, leather silk pattern. Right, comet tail silk pattern.

Distinctive Kashmir Sapphire Features

While Kashmir stones have typical sapphire inclusions, they may also contain unique, elongated zircon crystals. Some of them are much more extreme in length than pictured here. These and other inclusions often have streamers.

Zircon crystal inclusions in Kashmir sapphires.

Zircon crystal inclusions in Kashmir sapphires.

Another identifying feature is extreme color zoning. You can usually see colorless bands between the blue. This feature alone wouldn’t be sufficient to make a positive identification, but in combination with any of the above features, it’s a strong indication.

Color zoning in Kashmir sapphires

Extreme color zoning in Kashmir sapphires.

Identifying Characteristics

Sapphires are highly prized jewelry stones. Determining their geographic origin and whether they’re natural or lab-grown is critical. Fortunately, examining their inclusions, luminescence, and absorption spectra can reveal clues.

Inclusions

Sapphires have some characteristic inclusions that can help distinguish them from other natural gems. See the section on corundum in our article on inclusions of specific gemstones.

Inclusions can also help identify the source of a sapphire. See our article on identifying the origins of corundum gemstones for more information.

pink sapphire with fingerprint inclusion - Sri Lanka

Hot pink, oval step-cut Sri Lankan sapphire, 1.055 cts, with a fingerprint (healed fracture) inclusion. Photo courtesy of liveauctioneers.com and CorundumStones Mining Estate. (Cropped to show detail).

Some inclusions can also help identify a lab-made gem. For example, curved striae are found only in synthetic sapphires and rubies, never natural ones. See our article on inclusions of synthetic gemstones for more information.

Star Sapphires

Sapphires can display asterism or the “star effect” due to rutile inclusions in their hexagonal crystal matrix. If this rutile is sufficiently abundant and precisely arranged, proper cabochon cutting can create six-rayed star sapphires.

star sapphire ring

Star sapphire ring. Photo by Sheila Sund. Licensed under CC By 2.0.

Trapiche Sapphires
trapiche sapphire

Trapiche sapphire, 30.74 cts, 25.25 mm. © The Gem Trader. Used with permission. Used with permission.

Some sapphires can show a star-like “spoked wheel” pattern. However, these aren’t star sapphires. Known as trapiche gems, these rare sapphires develop with carbonaceous inclusions between their crystal growth sectors, which look like the spokes of a wheel. Since sapphires have a highly symmetrical hexagonal crystal habit, trapiche sapphires can show six distinct spokes.

Lapidaries can highlight the unusual appearance of these sapphires with slices or cabochon cuts.

Trapiche emeralds are perhaps the best-known examples of these gems, but other types of gemstones can develop this pattern, including aquamarines, garnets, rubies, spinels, and tourmalines.

Luminescence

Natural Blue Sapphire Fluorescence

Typically, natural blue sapphires have no reaction to ultraviolet light (UV). However, there are some notable exceptions:

  • Some blue Thai sapphires fluoresce weak greenish white in shortwave (SW) UV.
  • Sri Lankan blue sapphires may fluoresce red to orange in longwave (LW) UV and light blue in SW.
  • Blue color-change sapphires may show a weak, light red fluorescence in SW.
  • Some African blue sapphires may show moderate to strong orange fluorescence in SW.
  • Heat-treated blue gems sometimes fluoresce chalky green in SW.
Natural Fancy Sapphire Fluorescence
  • Green sapphires: inert.
  • Black sapphires: inert.
  • Sri Lankan yellow sapphires: fluoresce a distinctive apricot color in LW and X-rays, and weak yellow-orange in SW. The fluorescence in LW is proportional to the gem’s depth of color.
  • Pink sapphires: strong orange-red in LW, weaker color in SW.
  • Violet or alexandrite-like sapphires: strong red in LW, weak light red in SW.
  • Colorless sapphires: moderate light red-orange in LW.
  • Orange sapphires: a strong orange-red in the presence of LW.
  • Brown sapphires: usually inert or weak red in LW and SW.
  • Natural color-change sapphires: inert to strong red in LW, inert to moderate red to orange in SW.

This dramatic crystal specimen features a doubly terminated blueish gray sapphire, 13 cm long, perched in a metamorphic matrix. Both the crystal and matrix fluoresce a striking blue. Soboba Hot Springs, San Jacinto Mts, Riverside Co., California, USA. © Rob Lavinsky, www.iRocks.com. Used with permission.

Synthetic Sapphire Fluorescence

Some lab-created sapphires, both blue and fancy colors, can show different luminescent colors than their natural counterparts. This can help gemologists distinguish synthetics from mined gems.

  • Blue sapphires (synthetic): weak to moderate, chalky blue to yellow-green in SW.
  • Orange sapphires (synthetic): very weak, orange to red in SW.
  • Color change sapphires (synthetic): moderate orange to red in LW and SW, may fluoresce red in LW and mottled blue in SW.
  • Brown sapphires (synthetic): inert to weak red in LW and SW.
  • Green sapphires (synthetic): weak orange in LW, dull, brownish red in SW.
  • Pink sapphires (synthetic): moderate to strong red or orange/red in LW, moderate to strong reddish purple in SW.
  • Violet sapphires (synthetic): strong red in LW, strong greenish blue in SW.
  • Colorless sapphires (synthetic): inert to weak blueish white in SW.
  • Yellow sapphires (synthetic): very weak red in SW.
X-Ray Fluorescence

Some sapphires from Sri Lanka, Montana, and Kashmir glow dull red or yellow-orange when exposed to X-rays.

Sapphire Absorption Spectrum

The ferric iron spectrum dominates these stones. In green and blue-green gems, rich in iron, there are lines at 4710, 4600, and 4500 in the blue-green region. Also, lines at 4500 and 4600 may seem to merge and become a broad band. These three bands are generally known as the 4500 complex and are very distinctive in sapphires. Some blue Sri Lanka sapphires also show a 6935 red fluorescent line, and the 4500 line is very weak in these gems.

  • Lines rarely seen in Kashmir sapphires. Heat treated sapphires may show no lines or just at 4500.
  • Some flux grown synthetic sapphires have a faint line at 4500, most not diagnostic.
  • Synthetic color change sapphires show a line 4740.
  • Natural green sapphires show lines at 4500, 4600, and 4700.
  • Synthetic green sapphires show lines at 5300 and 6870.
  • Natural purple may show combination of ruby and sapphire spectrum.
  • Natural yellow, Australian, 4500, 4600, and 4700.
  • Other natural yellow to orange-yellow not diagnostic.
  • Yellow and orange line sapphires, 6900, cutoff at 4600. If no iron lines, likely synthetic.
  • Orange, if only thin lines in red, fluorescent line at 6900, and flawless, probably synthetic.

Synthetics and Simulants

Corundum gemstones, both rubies and sapphires, were first synthesized in the early 1900s by a simple flame fusion process. Today, many sapphires on the market are grown in labs. Gemologists need to be familiar with flame fusion as well as Czochralski, flux, and hydrothermal growth processes in order to distinguish natural from synthetic sapphires.

Modern laboratory methods can simulate natural formation conditions so closely that colors and even inclusions look extremely natural. Such stones are difficult for all but the most highly skilled professionals to identify as synthetic.

gold cufflinks with synthetic sapphires

14k yellow gold cufflinks with cabbed, synthetic sapphires, 30 cts. Photo courtesy of liveauctioneers.com and Avis Diamond Galleries.

Due to the popularity of blue sapphires, other natural blue gemstones may be used to simulate their appearance. Glass, plastic, and other synthetic materials may also be used. Sometimes, they may be misidentified as sapphires, either accidentally or deliberately in order to sell them for higher prices. Although consumers may find some lookalikes difficult to spot, professional gemologists can usually distinguish these gemstones with standard tests.

Although blue remains the most well-known and expensive sapphire color, you might also encounter simulated pink and padparadscha sapphires as their popularity increases.

earring with simulated pink sapphires

Cubic zirconia (CZ) can be manufactured colorless or in almost any color, so it can simulate not only diamonds but also many colored gemstones. The brilliant round-cut CZs in these sterling silver earrings imitate pink sapphires. Photo courtesy of liveauctioneers.com and 3 Kings Auction.

Enhancements

There are numerous treatment methods for sapphires. For details on these processes and how to distinguish them, see our article on corundum treatments.

heat-treated geuda sapphire - Sri Lanka

For decades, milky whitish sapphires from Sri Lanka known as geudas were heated at a high temperature to produce superb blue colors. However, this process can also turn geudas into fine yellow and orange gems, such as this 3.60-ct specimen. Photo © Joel E. Arem, PhD, FGA. Used with permission.

Sources

Sapphires occur abundantly all over the world, but gem-quality sapphires occur much more rarely and in fewer locations. The following are some of the most notable gem sources. Consult our article on identifying the origins of rubies and sapphires for additional sources and information.

Tanzanian sapphires

Sapphires, Umba River, Tanzania (1.98, 1.40, 1.86, 3.41, 3.28 // 0.96, 3.77, 1.46, 2.56, 4.64). The leftmost and rightmost stones on the bottom row may be rubies. Photo © Joel E. Arem, PhD, FGA. Used with permission.

Sri Lanka

This ancient source still produces beautiful sapphires of all colors. Most blue sapphires on the market originate from here, too. These gems tend to show slightly grayish to violet-blue hues and have a light to medium tone.

Sri Lankan sapphires

Sapphires, Sri Lanka (2.12, 3.76, 4.25, 5.21 // 6.05, 3.60, 4.02, 16.12). Photo © Joel E. Arem, PhD, FGA. Used with permission.

Kashmir

Kashmir stones set the standard for evaluating blue sapphires. Verified historic Kashmir sapphires can sell for astronomical prices. They have a velvety texture and their colors tend towards slightly purplish blue, with strong to vivid saturation and medium to medium-dark tone. Review the section on Kashmir sapphires above for more information.

Australia

Australian sapphires tend to have dark colors, although some very fine gems have come from the area. Also of interest are the parti-colored sapphires which are usually yellow and green or yellow and blue.

Myanmar

Formerly known as Burma, Myanmar produces some very high-quality sapphires. The colors are slightly violet blue, highly saturated, medium to medium dark tone.

oval-cut sapphire - Myanmar

Dark blue, oval brilliant step-cut sapphire, 2.07 cts, Myanmar. Photo courtesy of liveauctioneers.com and Kissing Auction.

Thailand

This nation produces blue sapphires abundantly. Their hue and saturation tend to be fine, although many are strongly dichroic, with a dirty green in one direction. Unless properly cut, the green will show in the finished stone. The stones are also very dark, requiring special cutting to show the color.

greenish blue sapphire - Thailand

Greenish blue, oval-cut sapphire, 0.70 cts, Thailand. Photo courtesy of liveauctioneers.com and Treasure of Gems & Jewelry.

Montana

This American state produces sapphires of all colors. Unfortunately, most of them are “steely,” meaning they have grayish saturation. The sapphires from Yogo Gulch are an exception, with some of the world’s finest coloring. However, these small stones rarely finish over one carat.

sapphire - Yogo Gulch, Montana

At 1.86 cts, this is an unusually large sapphire for Yogo Gulch, Montana. Photo © Joel E. Arem, PhD, FGA. Used with permission.

Stone Sizes

  • Smithsonian Institution (Washington, DC): 423 (blue, Sri Lanka, “Logan Sapphire”); 330 (blue star, Myanmar, “Star of Asia”); 316 (blue, Sri Lanka, “Star of Artaban”); 98.6 (deep blue, “Bismarck Sapphire”); 92.6 (yellow, Myanmar); 67 (black star, Thailand); 62 (black star, Australia); 42.2 (purple, Sri Lanka); 16.8 (green, Myanmar)
  • Private Collection: “Black Star of Queensland,” oval, found in 1948, 733 cts, world’s largest black star. A yellow crystal of 217.5 carats was found in Queensland, Australia in 1946.
  • Natural History Museum (Paris): the “Raspoli,” 135-ct brown sapphire, lozenge-shaped rough, clean.
  • Tested by the GIA: 5,600-ct sapphire cabochon; Montana blue sapphire, cushion-cut, 12.54 cts, believed largest stone from this locality.
  • Diamond Fund (Moscow): 258.8 (blue), fine, lively gem.
  • Royal Ontario Museum (Toronto, Ontario): 179.4 (golden yellow, Sri Lanka); 28.6 (Padparadscha, Sri Lanka); 43.95 (greenish yellow, Sri Lanka); 193.3 (blue star sapphire).
  • In 1929, the British mission to Burma (Myanmar) saw a 951-ct sapphire, which may be the largest ever found there.
  • American Museum of Natural History (New York): 536 (blue, “Star of India”); 116 (blue, “Midnight Star”); 100 (yellow, Sri Lanka); 100 (Padparadscha, very fine, Sri Lanka); 163 (blue, Sri Lanka); 34 (violet, Thailand).
  • Iranian Crown Jewels: Hollow rectangular cabochon of 191.6 carats; oval, yellow gem of 119 carats. Also fine Kashmir blue oval, nearly clean, 75 carats.

Not surprisingly, some sapphires have become well-known for their sizes as well as their histories. You can learn more about the Logan Sapphire, the Star of India, the Bismarck Sapphire, and other famous sapphires here.

Sapphire Trade Names

Please note: you may find these names used purely as descriptive terms. Sapphires can’t always be identified by their color alone. Always confirm the origin of a sapphire with a vendor, especially if the gem is sold with a “geographic” name. Ask if the name refers to the actual origin or simply the color.

  • Adamantine spar: brown, usually opaque but may be translucent to transparent.
  • African: usually light in tone.
  • Australian: usually very dark, some yellow and green parti-colored.
  • Burma or Oriental: slightly violet-blue, highly saturated, medium to medium dark tone.
  • Cashmere or Kashmir: velvety, slightly purplish blue, strong to vivid saturation, medium to medium dark tone.
  • Ceylon or Sri Lanka: light to medium tone, slightly grayish to violetish blue.
  • Geuda: milky stones from Sri Lanka that can turn blue as well as yellow or orange when heated.
  • Montana: all colors, usually light to medium tone, grayish saturation.
  • Padparadscha: “lotus flower” color,” pinkish orange.
  • Thai or Siamese: dark blue.

Yellow sapphire is sometimes misleadingly referred to as “Oriental Topaz” or “King Topaz.” Green sapphire is sometimes misleadingly referred to as “Oriental Emerald.” Purple sapphire is sometimes misleadingly referred to as “Oriental Amethyst.” Since these sapphire colors are less well-known, vendors might try to present them as gems more commonly and strongly associated with yellow, green, or purple, for example.

Consult our list of false or misleading gemstones names for more information.

yellow sapphire - Sri Lanka

Yellow sapphire, Sri Lanka, untreated, re-cut from 20.45 to 14.29 cts. Photo © Joel E. Arem, PhD, FGA. Used with permission.

Sapphire Care

Sapphire’s hardness is second only to diamond among natural gems. It also has no cleavage planes. This makes it a superb jewelry stone. Of course, a heavily included or fractured stone will be less stable.

For reasonably clean stones, no special wear or care precautions are necessary. However, avoid cleaning any oil-treated sapphires with ultrasonic systems. Otherwise, you can clean sapphires with mechanical systems. Nevertheless, cleaning your sapphires at home with warm water, detergent, and a soft brush or taking them to a professional jeweler are your safest choices.

Consult our gemstone jewelry care guide for more recommendations.

blue sapphire with halo ring setting

Blue sapphire in a halo setting. Photo by ebedner. Licensed under CC By-ND 2.0.

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