Search Results for: Other mineral substances
process, they are often confounded with sapphire and ruby. key facts black spinel is amongst the few naturally occurring stones which are formed by metamorphic activit,y that happens when the molten rock is combined with limestone or dolomites. this result in the deposits, that appears as durable mineral
inside the rock. mineral family- spinel composition– (mg,zn)al o . refractive index– - hardness- colors- other than black they come in red, pink, blue, yellow, and amber deposits- brazil, afghanistan, madagascar, nigeria, and nepal related products black spinel black onyx aquamarine amethyst carnelian...
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