Spessartite Garnet Value, Price, and Jewelry Information


Fancy Brilliant Emerald Cut Spessartite Garnet
Fancy Brilliant Emerald Cut Spessartite Garnet by Daniel Stair

Spessartite is somewhat rare. As with the other garnets, it always occurs in a blend with other species. Gems with the highest spessartite content are a light orange. Those with an almandine content are reddish, to red brown in hue.

Spessartite Value

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Garnet Value via Gem Price Guide
Top Color: oR, R, PR, rP 6/4
Almandine All sizes
to /ct
Fine Color Andradite: G 5/4
Andradite All sizes
to /ct
Chrome Pyrope All sizes
to /ct
Color Change .5 to 1 carat 1 to 6 carats
Africa to /ct to /ct
US to /ct to /ct
Demantoid to 1 carat 1 to 3 carats
to /ct to ,000/ct
Grossular Garnet .5 to 1 carat 1 to 5 carats 5 carats plus
Mint Green (Merlani) 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
Fine Color Hessonite: yO 4/5
Hessonite Garnet All sizes
to /ct
Malaya Garnet .5 to 1 carat 1 to 5 carats 5 carats plus
to /ct to /ct to /ct
Mozambique All sizes
to /ct
Mali Garnet All sizes
to /ct
Fine Color Spessartite: O 4/5
Mandarin Orange All sizes
to /ct
Fine Color Pyrope: R 6/5
Pyrope 1 carat plus
/ct
Fine Color Rhodolite: 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
Spessartite Reds See Mandarin above .5 to 3 carats 3 to 6 carats
Little 3 Mine to /ct to /ct
African to /ct to /ct
Darker reds to /ct
Star Garnet All sizes
6 ray star to /ct
4 ray star to /ct
Fine Color Tsavorite: G 6/5
Tsavorite .5 to 1 carat 1 to 2 carats 2 carats plus
Faceted to /ct to /ct to ,000/ct
Uvarovite 10 carats plus
Druzy to /ct
Cabochons All Sizes
Common red to purple to /ct

See the entire Gem Price Guide.

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Spessartite Information

DataValue
NameSpessartite
Is a Variety ofGarnet
VarietiesMandarin Garnet
Crystallography Isometric
Refractive Index 1.79 - 1.83
Hardness 7 - 7.5
Specific Gravity 3.80 - 4.25. Gems usually 4.12-4.20.
Cleavage None
Dispersion 0.027
Heat SensitivitySome
Luminescence None
Spectral The Mn spectrum is evident: lines at 4950, 4850, 4620 (all weak) and strong lines at 4320, 4240 (weaker), and 4120 (intense). Almandine may be present, contributing lines at 4320 and 4120.
Wearability Good
FormulaMn3Al2Si3O12
Spessartite Rough
Spessartite Rough

This garnet is named after Spessart, Bavaria.

Spessartite is somewhat rare. As with the other garnets, it always occurs in a blend with other species. Gems with the highest spessartite content are a light orange. Those with an almandine content are reddish, to red brown in hue.

In granite pegmatites; also gneiss, quartzite and rhyolite, and sometimes as a component in skarns.

Nevada; Colorado; New Mexico; Pennsvlvania; North Carolina.

San Diego County, California: good crystals, especially at Ramona (fine orange gems).

Amelia Court House, Virginia: fine orange to deep brownish material, gemmy.

Norway; Tsializina. Madagascar

Sri Lanka and Burma: in the gem gravels.

Brazil (Arassuahy and Ceara): large crystals (up to several pounds), gemmy, fine color.

The most valuable spessarties are a bright, orangish red. These come from Ramona, California, and Amelia, Virginia..

Gems weighing more than 100 carats have been cut from Brazilian and Madagascar rough. Amelia stones are fine color (orange) but small, up to about 15-20 carats, although crystals weighing several pounds have been found there.

Smithsonian Institution (Washington, D.C): 109 (red, Brazil); 53.8 (red, Brazil); 40.1 (orange, Virginia). American Museum of Natural History (New York): 96 (reddish, Brazil—not clean).

Spessartine is fairly rare as a gem garnet, and one of the most beautiful. Large stones are very rare, and usually quite dark. The finest color is an orangy red, as exemplified by the material from Ramona, California, and Amelia, Virginia. A red-brown tint indicates a higher content of almandine, accompanied by higher refractive index; pale orange colors are closer to pure spessartine. Spessartine as a component of almandine tends to add a lively reddish tinge of color.

Spessartine is fairly rare as a gem garnet, and one of the most beautiful. Large stones are very rare, and usually quite dark. The finest color is an orangy red, as exemplified by the material from Ramona, California, and Amelia, Virginia. A red-brown tint indicates a higher content of almandine, accompanied by higher refractive index; pale orange colors are closer to pure spessartine. Spessartine as a component of almandine tends to add a lively reddish tinge of color.

Unusual color-change garnets with large amounts of V and Cr have been reported from East Africa. These are primarily spessartine, with an unusually large component of grossular. The color change may be as follows:

1. greenish yellow-brown (transmitted fluorescent light) to purplish red (reflected fluorescent); reddish orange to red (incandescent light) N= 1.773, S.G.= 3.98; spessartine/grossular/almandine.

2. light bluish green (transmitted fluorescent) to purple (reflected); light red to purplish red (incandescent) N= 1.763, S.G. = 3.89; spessartine/grossular/pyrope.

So-called alexandrite-like garnets have also been noted, changing from violet-red to blue-green. These are usually small, but a stone of 24.87 carats was sold in 1979.

OPTICS:

N= 1.79-1.81;

1.803-1.805 (Brazil).

1.795 (Amelia, Virginia).

INCLUSIONS: Wavy feathers, due to liquid drops that have a shredded look, especially in gems from Sri Lanka and Brazil.