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silicon dioxide
sapphires get their various colors from trace elements
Its origins are still a mystery with some saying it was from a meteorite impact on earth and others believing it was an asteroid burning up in the atmosphere
is a rare
an iron sulfide
Fluorite 6-9mm Banded Chip A Grade - 15-16 Inch 12092021FEATURE silicon dioxideFluorite is a luminous, soft and glassy stone, sometimes referred to as the most colorful mineral in the world. It is one of the most sought to after minerals among gem and mineral collectors, second only to Quartz. The term fluorescent was inspired by Fluorite, one of the first fluorescent minerals ever studied. It is frequently fluorescent under ultraviolet light, and this phenomenon is thought to be due to impurities of yttrium or organic matter
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