Quartz with sphalerite inclusions
|Catalog Number||NMNH G11585-00|
It is common to find inclusions in quartz crystals. Quartz is usually one of the last minerals to form in a deposit, so it sometimes grows around existing crystals. Because quartz is commonly clear, the inclusions are easy to see. This emerald-cut quartz from Brazil has brownish-orange sphalerite crystal inclusions. In this specimen, the spalerite inclusions appear to be floating in the clear quartz gem. Sphalerite is a zinc sulfide, an ore of zinc.This 14.31ct gem is the first quartz gemstone with sphalerite inclusions in the National Gem Collection.
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