Inyoite

Inyoite Monte Azul, Plano, Argentina Small Cabinet, 7.0 x 4.9 x 4.6 cm © irocks

Chemical Formula: Ca(H4B3O7)(OH)·4H2O
Locality: Mount Blanco mine, Mount Blanco, Black Mountains, Death Valley, Inyo County, California.
Name Origin: Named after it’s locality.

Inyoite, named after Inyo County, California, where it was discovered in 1914, is a colourless monoclinic mineral. It turns white on dehydration. Its chemical formula is Ca(H4B3O7)(OH)·4H2O or CaB3O3(OH)5·4(H2O).

Physical Properties

Cleavage: {001} Good
Color: White, Pinkish white.
Density: 1.87
Diaphaneity: Transparent to Translucent
Fracture: Uneven – Flat surfaces (not cleavage) fractured in an uneven pattern.
Hardness: 2 – Gypsum
Luminescence: Non-fluorescent.
Luster: Vitreous (Glassy)
Magnetism: Nonmagnetic
Streak: white

Photos :

Inyoite Monte Azul, Plano, Argentina Miniature, 5.3 x 3.3 x 2.7 cm © irocks
Inyoite Monte Azul, Plano, Argentina Cabinet, 12.2 x 5.6 x 4.7 cm © irocks
Inyoite Monte Azul, Plano, Argentina Cabinet, 11.3 x 10.4 x 4.8 cm © irocks
Meyerhofferite after Inyoite 20 Mule Team Canyon, Furnace Creek, Death Valley National Park, Inyo Co., California, USA Cabinet, 11.9 x 9.5 x 6.7 cm © irocks
Monte Azul deposit, Sijes, Salta, Argentina © Rob Lavinsky
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