Mandarin Garnet Value, Price, and Jewelry Information

Mandarin garnet (spessartite), 20.04 cts, 15 x 13 x 12 mm, Namibia. © Rob Lavinsky, www.iRocks.com. Used with permission.

Mandarin Garnet

While the colors of spessartine or spessartite garnet gemstones cover a wide range of orange shades, the mandarin garnet is as pure orange as this variety can be. Discovered in Namibia in the 1990s, this rare gem is highly desired as a jewelry stone for its eye-catching color, brilliance, and hardness.

Mandarin Garnet Value

The purer the orange color, the more valuable the mandarin garnet.

For more detailed information on quality factors for mandarin and other varieties of garnets, consult our garnet buying guide.

Mandarin garnet rough - Africa

Mandarin orange spessartite garnets from Africa. © Dan Stair Custom Gemstones. Used with permission.

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

Garnet Value via Gem Price Guide

Almandine

Top Color: oR, R, PR, rP 6/4
Almandine All sizes
to /ct

Almandine/Pyrope Blend ("Mozambique")

Red-Brown Colors
"Mozambique" All sizes
to /ct

Rhodolite (Almandine/Pyrope Blend)

Fine Color: rP, PR 6/5
Rhodolite .5 to 1 carat 1 to 10 carats 10 carats plus
Faceted to /ct to /ct to /ct
Cabochons to /ct to /ct to /ct

Andradite

Fine Color: G 5/4
Andradite All sizes
to /ct

Demantoid

Demantoid to 1 carat 1 to 3 carats
to /ct to ,000/ct

Grossular

Grossular .5 to 1 carat 1 to 5 carats 5 carats plus
Mint Green (Merelani) to /ct to /ct to /ct
Yellow/Orange to /ct to /ct to /ct
Yellow/Green to /ct to /ct to /ct
Other colors /ct /ct to /ct

Hessonite

Fine Color: yO 4/5
Hessonite Garnet All sizes
to /ct

Tsavorite

Fine Color: G 6/5
Tsavorite .5 to 1 carat 1 to 2 carats 2 carats plus
Faceted to /ct to /ct to ,000/ct

Mali Garnets (Andradite/Grossular Blend)

Mali Garnet All sizes
to /ct

Malaya (Malaia) Garnets

Malaya Garnet .5 to 1 carat 1 to 5 carats 5 carats plus
to /ct to /ct to /ct

Pyrope

Fine Color: R 6/5
Pyrope 1 carat plus
/ct

Chrome Pyrope

Chrome Pyrope All sizes
to /ct

Spessartite

Spessartite Reds .5 to 3 carats 3 to 6 carats
Little 3 Mine to /ct to /ct
African to /ct to /ct
Darker reds to /ct

Mandarin

Fine Color: O 4/5
Mandarin Orange All sizes
to /ct

Uvarovite

Uvarovite 10 carats plus
Druzy to /ct

Star Garnet

Star Garnet All sizes
6 ray star to /ct
4 ray star to /ct

Color Change

Color Change .5 to 1 carat 1 to 6 carats
Africa to /ct to /ct
US to /ct to /ct

Cabochons

Cabochons All Sizes
Common red to purple to /ct

Mandarin Garnet Information

Data Value
Name Mandarin Garnet
Is a Variety of Spessartite Garnet
Crystallography Isometric.
Refractive Index 1.789-1.797
Colors Orange
Luster Vitreous.
Hardness 7-7.5
Wearability Good
Fracture Conchoidal
Specific Gravity 4.09-4.15
Birefringence None.
Cleavage None
Dispersion 0.027
Transparency Transparent, translucent
Absorption Spectrum Lines at 4080, 4210, 4300, 4570, 4830, and 5270.
Birthstone January (Garnet)
Formula Mn3Al2Si3O12
Pleochroism None.
Optics Isotropic.
Etymology After the color, “mandarin orange.”
Occurrence Schist, gneiss
Inclusions Curved fibers; round and angular crystals: quartz, fibrous amphibole, barite; oxide minerals
pear-cut mandarin garnet

Pear-cut mandarin orange spessartite garnet, 4.66 cts, 11.6 x 8.8 x 5.4 mm, Namibia. Image courtesy of liveauctioneers.com and Simrit Collections.

Comments

Mandarin garnet is unequivocally orange, but its exact definition can vary. “Mandarin garnet” has been used as a trade name for vivid orange spessartite garnets from Namibia as well as a trade name for all spessartite garnets that possess that color. In the mid 1990s, the only garnets that fit either description were from Namibia. Like other garnets, these gemstones were mixed species. Their average composition was 85 mol.% spessartite, 12.5 mol.% pyrope garnet, and 2.5 mol.% grossular garnet. The high manganese (Mn) content of spessartite gave them their striking orange color.

In 1998, Nigeria began producing gem-quality spessartite (95 mol.%) with an orange color that approaches that of the Namibian material. In 2007, gem-quality orange spessartite was discovered in Tanzania with a composition very close to the Namibian stones: 77.5 mol.% spessartite, 17.9 mol.% pyrope, and 4.6 mol.% grossular.

mandarin garnet crystal - Tanzania

Mandarin orange crystal (spessartite garnet), Loliondo, near Serengeti National Park, Tanzania. © Rob Lavinsky, www.iRocks.com. Used with permission.

Whether defined by color, source, or chemical composition, Mandarin garnets made a splash in the jewelry world. Spessartite garnets are rare, and facetable material rarer still. The discovery of these gem-quality African gemstones meant jewelers and consumers could explore and enjoy the brilliance of these garnets.

Synthetics

Laboratories haven’t synthesized mandarin garnets. However, orange glass as well as orange yttrium aluminum garnet (YAG), a synthetic garnet, have served as simulants.

Enhancements

These gemstones don’t normally receive any treatments or enhancements, thus making them very desirable to collectors and enthusiasts of natural gems.

Sources

  • Namibia (Northwest): Marienfluss, Kunene Region
  • Nigeria; Tanzania.
mandarin garnet - Marienfluss, Kunene, Namibia

This spessartite garnet crystal in schist matrix displays the classic mandarin orange hue. Marienfluss, Kunene Region, Namibia, 5.0 x 4.7 x 3.0 cm. © Rob Lavinsky, www.iRocks.com. Used with permission.

Stone Sizes

Mandarin garnets greater than 10 carats are extremely rare. At the Tucson Gem and Mineral Show in 1995, Colgem displayed a faceted, cushion-shaped 29.77-ct stone and an eye-clean triangular mix-cut 14.77-ct stone. The Houston Museum of Natural Science has a gold ring with a faceted 39.35-ct mandarin garnet on display.

Trade Names

When first discovered, mandarin garnets received trade names such as “hollandines” and “Kunene spessartines.”

Care

The use of warm water, detergent, and a soft brush is the recommended cleaning method for all garnets. Consult our gem care guide and jewelry cleaning guide for more information.

mandarin garnet and cognac diamond ring

Ring with cognac diamonds and a 39.35-ct mandarin garnet, designed and created by Ernesto Moreira, Houston Museum of Natural Science. Photo by Assignment Houston One. Licensed under CC By-SA 2.5.