Oregon Sunstone Value, Price, and Jewelry Information

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Oregon sunstone, light brownish green with schiller effect, custom marquise-cut by Tom Munsteiner. 1.64 cts, 16.8 x 6.4 mm, Oregon, USA. © The Gem Trader. Used with permission.

While feldspar sunstones from sources around the world have been used for carvings and cabochons, Oregon sunstone material has proven to be facetable, too. These stones frequently display a stunning glowing or glittery optical effect.

Oregon Sunstone Value

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Schiller
  • Color Intensity: Light, medium, deep
  • Color Range: Clear, gold, peach, coral, orange, red, green
  • Transparency: Translucent to Opaque

Schiller

All Sizes
Schiller
-/ct
Clear Hues
  • Color Intensity: Light
  • Color Range: Clear, gold, peach, coral, pink, red, green, blue
  • Transparency: Transparent

Clear Hues

Up to 2.5 carats
Clear
/ct
Peach Pink
/ct
Light Blue Green
/ct
2.5-5 carats
Clear
/ct
Peach Pink
/ct
Light Blue Green
/ct
5-7 carats
Clear
/ct
Peach Pink
/ct
Light Blue Green
/ct
7 carats
Clear
/ct
Peach Pink
/ct
Light Blue Green
/ct
Mid-Deep Tones
  • Color Intensity: Medium to deep
  • Color Range: Strong Peach, orange, red, green, blue
  • Transparency: Transparent

 

Mid-Deep Tones

Up to 2.5 carats
Med Red Orange
/ct
Red
/ct
Blue Green
/ct
2.5-5 carats
Med Red Orange
/ct
Red
/ct
Blue Green
/ct
5-7 carats
Med Red Orange
/ct
Red
/ct
Blue Green
/ct
7 carats
Med Red Orange
/ct
Red
/ct
Blue Green
/ct
Constellation, AKA Aventurescent
  • Color Intensity: Medium to deep
  • Color Range: Strong peach, orange, red, green, blue
  • Transparency: Transparent

Constellation, AKA Aventurescent

Up to 2.5 carats
Mid to Deep Color Constellation
/ct
2.5-5 carats
Mid to Deep Color Constellation
/ct
5-7 carats
Mid to Deep Color Constellation
/ct
7 carats
Mid to Deep Color Constellation
/ct
Two Tone (Dichroic)
  • Color Intensity: Medium to deep
  • Color Range: Strong peach, orange, red, green, blue
  • Transparency: Transparent

Two Tone (Dichroic)

Up to 2.5 carats
Light Dichroic
/ct
Med Dichroic
/ct
Deep Dichroic
/ct
2.5-5 carats
Light Dichroic
/ct
Med Dichroic
/ct
Deep Dichroic
/ct
5-7 carats
Light Dichroic
/ct
Med Dichroic
/ct
Deep Dichroic
/ct
7 carats
Light Dichroic
/ct
Med Dichroic
/ct
Deep Dichroic
/ct
Classic Sunstone
  • Color Intensity: Combination of light-medium or light-deep
  • Color Range: Gold, peach, coral, pink, red, green, blue
  • Transparency: Transparent

Note: There was a limited sampling of larger sized stones, which may affect pricing accuracy.

Classic Sunstone

Up to 2.5 carats
Light Classic Pink/Peach
/ct
Classic Mid to Deep Red
/ct
Classic Blue/Green
2.5-5 carats
Light Classic Pink/Peach
/ct
Classic Mid to Deep Red
/ct
Classic Blue/Green
5-7 carats
Light Classic Pink/Peach
/ct
Classic Mid to Deep Red
/ct
Classic Blue/Green
7 carats
Light Classic Pink/Peach
Classic Mid to Deep Red
Classic Blue/Green
Mystique
  • Color Intensity: Light, medium, deep
  • Color Range: Gold, peach, coral, pink, red, green, blue
  • Transparency: Transparent

Mystique

Up to 2.5 carats
Med-Deep Mystique
/ct
2.5-5 carats
Med-Deep Mystique
/ct
5-7 carats
Med-Deep Mystique
/ct
7 carats
Med-Deep Mystique
/ct
Accompanying value information:
View Oregon Sunstone Profile

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

Pale yellow to colorless, non-phenomenal Oregon sunstones, whether native-cut or calibrated stones, may go for a few dollars per carat to $20 per carat for a custom cut. Pinks and tans, with and without a schiller effect, commonly range up to $50 per carat, depending on the effect.

Opaque, cabbed stones are modestly priced. Some greens, strong pinks, and reds, as well as bi-colored and tri-colored stones, with and without schiller, range from $50 to $300 per carat.

Large stones (over three carats) with an intense red color may retail for as much as $1,700 per carat. The best greens are very rare and may cost more than the best reds.

Oregon sunstone pendant

Custom pendant. 6-ct Oregon sunstone, octagonal cut, diamonds, and platinum. © J. Grahl Design. Used with permission.

Carved Oregon sunstone pieces are valued as much for their artistic merit as for the material itself.

Oregon Sunstone Carving

A freeform Oregon sunstone carving by Martha Borzoni of Different Seasons Jewelry. Photo by Jessa and Mark Anderson is licensed under CC By 2.0.

For more information on Oregon sunstone value factors, consult our buying guide.

Oregon Sunstone Information

Data Value
Name Oregon Sunstone
Is a Variety of Feldspar
Crystallography Triclinic
Refractive Index 1.559-1.573
Colors Shades of pink, tan, orange, yellow, green, blue-green, red, and clear as well as multi-colors.
Luster Vitreous
Polish Luster Vitreous
Hardness 6-6.5
Wearability Poor
Fracture Uneven
Specific Gravity 2.71-2.73
Birefringence 0.008
Cleavage Perfect two directions
Heat Sensitivity No
Special Care Instructions Avoid rough handling
Transparency Transparent to opaque
Phenomena Aventurescence or schiller effect. (See “Identifying Characteristics” below).
Formula Oregon sunstone is a variety of labradorite, a mineral in the plagioclase feldspar solid-solution series, with a composition of 32% albite (NaAlSi3O8) and 68% anorthite (CaAl2Si2O8).
Pleochroism Usually absent in feldspar but notable in Oregon sunstone. (See “Identifying Characteristics” below).
Optics a = 1.559-1.563; γ = 1.569-1.573. Biaxial (+).
Optic Sign Biaxial +
Etymology After the state and the “sun-like” golden red schiller effect found in some of these stones.
Occurrence Basalt flows
Inclusions Copper inclusions. (See “Identifying Characteristics” below).
Oregon sunstone colors

Oregon sunstones, showing color range (~ 1 to 5 cts). Photo © Joel E. Arem, PhD, FGA. Used with permission.

What is Oregon Sunstone?

Gem collectors and jewelry lovers from all over the world are fast becoming aware of this uniquely American gemstone. While many varieties of labradorite feldspar can display aventurescence or schiller and are commonly called “sunstones,” those effects are typically caused by inclusions of hematite or goethite. In contrast, the labradorite sunstones found in Oregon have inclusions of copper. This unique happenstance means these gemstones may both display a schiller effect and transparency. This makes them highly desirable as faceted jewelry stones.

Intense red and transparent gems with schiller are in great demand. However, many color varieties occur in Oregon, with and without the glowing effect.

Oregon sunstone - red colors

Red Oregon sunstones. Note the glittery schiller effect of the leftmost gem on the top row. Photo © Joel E. Arem, PhD, FGA. Used with permission.

Oregon Sunstone Symbolism

Although a relative newcomer to many in the gem buying public, Oregon sunstone has traditionally been valued and traded by the Native Americans of the Pacific Northwest. In 1987, Oregon officially declared it its state gemstone. In the esoteric realm of birthstone mythology, sunstones are considered the phenomenal birthstone for those born on Sunday.

Is Oregon Sunstone the Same Thing as Viking Sunstone?

Although they share a name (and pleochroism, the display of two or more colors when viewed from different angles), Oregon sunstones are not the so-called “sunstones” Vikings reputedly used to navigate on overcast days or when the sun was low in the Arctic sky. Pleochroic iolite was most likely the “Viking Compass.”

Identifying Characteristics

Inclusions

The only feldspar sunstone with copper inclusions is Oregon sunstone. However, not all specimens display the schiller effect. The copper inclusions in Oregon sunstone come in varieties like threads, spots, sheets, and clouds.

Oregon sunstone - examples of schiller

Oregon sunstones. © Joel E. Arem, PhD, FGA. Used with permission.

Pleochroism

Stone Color Pleochroism
Yellow colorless/light yellow
(Multi-colored) red-orange violet /reddish orange
(Multi-colored) blue-green blueish green/light red
Red Orange orange/light reddish purple
Blueish green blueish green/light orange/colorless
Orange orange/reddish orange
Yellowish green blueish green/light orange
Blue-green and violet red-violet/reddish orange/blueish green

Synthetics

Oregon sunstones have not been synthesized. However, goldstone, a synthetic material made of glass with copper inclusions, may be used as a simulant. A gemologist can easily distinguish a natural Oregon sunstone from one of these glass pieces.

Enhancements

Although plagioclase feldspars such as andesine can be enhanced with the addition of copper through heating and pressure treatments, Oregon sunstone isn’t known to be enhanced or treated. It acquires its copper naturally.

Sources

Substantial amounts of high-value Oregon sunstone rough are now being extracted from its namesake state. 

Harney County and Lake County, Oregon produce Oregon sunstone. Companies on private claims mine most of this material. However, there’s a public Sunstone Collection Area in Lake County.

Oregon sunstone natural crystal and faceted gem

Oregon sunstone rough and cut set, Plush, Lake County, Oregon, USA. 2.7 x 1.7 x 0.9 cm (natural crystal), 3.57 cts (brilliant oval-cut gem). © Rob Lavinsky, www.iRocks.com. Used with permission.

Caring for Oregon Sunstone Jewelry

Because of their hardness of 6 to 6.5, Oregon sunstones are best suited for jewelry such as pendants, earrings, brooches, or other pieces that won’t endure heavy wear. Common dust has a hardness of 7 to 7.5 and will scratch this material. Steel can also scratch gems with a hardness of 6. For ring use, place Oregon sunstones in protective settings.

The best cleaning method for Oregon sunstones is warm water, detergent, and a soft brush. Avoid mechanical cleaning methods such as ultrasonic systems and steam. Consult our gemstone jewelry cleaning guide for more information.

Oregon sunstone ring

14k white gold ring featuring a 3.67-ct Oregon sunstone from the Butte Mine and 0.21-ctw diamonds. Photo courtesy of liveauctioneers.com and Roland NY.

Examples of Oregon Sunstones

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