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Name Origin | Brazilianite is named after occurrence in Brazil |
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Chemical Formula | NaAl3(PO4)2(OH)4 |
Color | Colorless, pale yellow, yellowish-green, greenish |
Fracture | Conchoidal, Brittle |
Hardness | 5.5 on the Mohs scale |
Crystal System | Monoclinic. Crystals equant, prismatic, spear-shaped |
Cleavage | good 1 direction |
Specific Gravity (SG) | 2.980 - 2.995 |
Lustre | Vitreous |
Pleochroism | weak-merely a change in shade of color |
Note: Brazilianite crystallizes in the monoclinic system and it is translucent to transparent. Brazilianite was discovered in 1944. Gems are suitable only for collections, but the color is lovely. Faceted stones are often flawed in large sizes, so a clean gem over 15 carats is a great rarity. A brilliant-cut stone, weighing 19 carats, is in the American Museum of Natural History, New York.
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Agate
Turquoise
Herderite
Hambergite
Langbeinite
Actinolite
Apatite
Beryllonite
Kyanite
Willemite
Sugilite
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Dolomite
Brazilianite
Chert
Chrysocolla
Gypsum
Cerussite
Coral
Euclase
Agate
Turquoise
Herderite
Hambergite
Langbeinite
Actinolite
Apatite
Beryllonite
Kyanite
Willemite
Sugilite
Marcasite
Wulfenite
Dolomite
Brazilianite