Sugilite vs Turquoise
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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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Turquoise
Turquoise is an opaque blue-to-green mineral and a hydrated phosphate of copper and aluminium. It has been used as an ornamental stone and jewelry material for thousands of years, and deposits in the southwestern United States have a long history of mining, trade, and use in Native American arts. The mineral's color can range from blue through green depending on its composition and formation condi...
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