15" Polished Quartz Bowl - Madagascar

This is a giant 15" wide, polished quartz bowl from Madagascar. This specimen has been polished into a large bowl, from a larger chunk of quartz. There are some inclusions and signs of iron oxidation throughout this crystal bowl, and it weighs just under 32 lbs.

Quartz is the name given to silicon dioxide (SiO2) and is the second most abundant mineral in the Earth's crust. Quartz crystals generally grow in silica-rich environments--usually igneous rocks or hydrothermal environments like geothermal waters--at temperatures between 100°C and 450°C, and usually under very high pressure. In either case, crystals will precipitate as temperatures cool, just as ice gradually forms when water freezes. Quartz veins are formed when open fissures are filled with hot water during the closing stages of mountain formation: these veins can be hundreds of millions of years old.

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DETAILS
SPECIES
Quartz
LOCATION
Madagascar
SIZE
15" wide, 6.3" tall
CATEGORY
ITEM
#59682