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Zircon
What is Zircon? Group: silicates Sub-group: nesosilicates Etymology: from Arabic "zargoun" meaning "vermilion," or Persian "zargun" meaning "gold." Hardness (Mohs scale): 6.5 to 7.5 Main deposits: Myanmar, Cambodia, Sri Lanka, Thailand, Brazil, Australia, Korea, Madagascar, Mozambique, Nigeria, Tanzania, Vietnam... Colors: colorless, blue, yellow, orange, red, brown, green, purple Chemical composition: ZrSiO4 Crystal system: tetragonal Constitution: zirconium silicate Development environment: gneisses, granites, syenites, and pegmatites.
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