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Brownish-black Grossular Garnet (from Tanzania of Africa)
Description: Matrix specimen of sparkling, lustrous brownish-black Grossular crystals.
Locality: Tanzania
Dimensions: 70x58x43 mm
Weight: 234.3 gram
***
Grossular Garnet
Grossular is member of the Garnet group, and is its most varicolored form, occurring in almost all colors except for blue. Grossular is often dark in color, but it also forms the lightest colored forms of Garnet, and can even be white or colorless. Although not as famous as Almandine and Pyrope, Grossular has some important gem varieties. These include the rare emerald-green Tsavorite and the orange to orange-brown Hessonite.
Grossular forms a solid solution series with Andradite, and can be virtually indistinguishable from it in localities where they both occur together. In some localities such as Mali, a distinction between these two Garnets is sometimes too complex, and a specimen may just be called "Andradite/Grossular since its full identification is lacking. Grossular is named for its color resemblance to gooseberries, which are scientifically known as ribes grossularium.
Chemical Formula Ca3Al2Si3O12
Composition Calcium aluminum silicate, often with some iron, manganese, or chromium replacing some aluminum
Color Brown, orange, green, yellow-green, and gray. Less often pink, red, and yellow. Rarely white, and colorless. Some massive specimens may be multicolored white, light green, and pink.
Hardness 6.5 - 7.5
Crystal System Isometric
Transparency Transparent to nearly opaque
Luster Vitreous
Item Specifics | |
---|---|
Brand : | Unbranded |
Country/Region of Manufacture : | Tanzania, United Republic of |
Transparency : | Opaque |
Cut Grade : | Good |
Country of Origin : | Tanzania, United Republic of |
Gemstone Type : | Garnet |
Gemstone Color : | Brown-black |
Gemstone Creation : | Natural |
Gemstone Form : | Rough |
Gemstone Treatment : | Not Enhanced |
Gemstone Clarity Grade : | Eye Clean |
Gemstone Shape : | Natural |
Certification : | NA |
Item Length : | 70 mm |
Item Width : | 58 mm |
Item Depth : | 43 mm |
Gemstone Effect : | Iridescence |
Number of Pieces : | 1 |
Wholesale : | No |
Vintage : | No |
California Prop 65 Warning : | NA |
MPN : | NA |
Item Length : | 70 mm |
Item Width : | 58 mm |
Item Depth : | 43 mm |
Gemstone Effect : | Iridescence |
Number of Pieces : | 1 |
Wholesale : | No |
Vintage : | No |
California Prop 65 Warning : | NA |
MPN : | NA |
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We send the goods to other countries by registered airmail and will take about 8 to 14 working days for delivery.
Returns: We accept returns with any reason in 30 days.
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Brownish-black Grossular Garnet From Tanzania 234.3 gram 70x58x43 mm
Brownish-black Grossular Garnet (from Tanzania of Africa)
Description: Matrix specimen of sparkling, lustrous brownish-black Grossular crystals. Locality: Tanzania
Dimensions: 70x58x43 mm
Weight: 234.3 gram
*** Grossular Garnet Grossular is member of the Garnet group, and is its most varicolored form, occurring in almost all colors except for blue. Grossular is often dark in color, but it also forms the lightest colored forms of Garnet, and can even be white or colorless. Although not as famous as Almandine and Pyrope, Grossular has some important gem varieties. These include the rare emerald-green Tsavorite and the orange to orange-brown Hessonite. Chemical Formula Ca3Al2Si3O12 Composition Calcium aluminum silicate, often with some iron, manganese, or chromium replacing some aluminum Color Brown, orange, green, yellow-green, and gray. Less often pink, red, and yellow. Rarely white, and colorless. Some massive specimens may be multicolored white, light green, and pink. Hardness 6.5 - 7.5 Crystal System Isometric Transparency Transparent to nearly opaque Luster Vitreous
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By Paypal Shipping
Free shipping cost. We send the goods to USA, Canada, UK, Australia, New Zealand, EU countries and some other European and Asian countries by E-express, a kind of fast postal service by Hong Kong Post. It usually takes about 6 to 10 working days for delivery. We send the goods to other countries by registered airmail and will take about 8 to 14 working days for delivery. Returns
Returns: We accept returns with any reason in 30 days. Contact Us
We will answer buyer messages within 24 hours during working days. All right reserved. |
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