Amazonite vs Sugilite
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Amazonite
Amazonite is the blue-green variety of microcline, a potassium feldspar. It is typically opaque to translucent, with color ranging from pale green to blue-green and often with white streaks or patches. Documented localities include Colorado and Virginia in the United States, as well as Russia, Madagascar, and Brazil; the material is used for cabochons, beads, ornamental objects, and mineral specim...
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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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