Malachite vs Sugilite
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Malachite
Malachite is a green copper carbonate hydroxide mineral with the chemical formula Cu2CO3(OH)2. It commonly forms opaque, botryoidal, fibrous, or banded aggregates, and its alternating light and dark green bands are especially recognizable in polished specimens. Malachite has been used as a copper ore, ornamental stone, pigment, and material for carved objects and jewelry, although it is relatively...
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Sugilite
Sugilite is a rare purple to pink manganese-bearing cyclosilicate mineral, usually found as opaque masses rather than transparent crystals. It was first identified in 1944 on Iwagi Islet, Japan, by petrologist Ken-ichi Sugi and colleagues, and was named for Sugi when formally described in 1976. Gem-quality material associated with the Kalahari Manganese Field in South Africa is used in cabochons,...
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