4.3" Polished Quartz Sphere - Madagascar

This is a 4.3" wide, polished quartz sphere from Madagascar. This sphere has been polished into a perfect round sphere from a larger chunk of quartz. Iron oxidation can be seen throughout the sphere, indicated by the orange tint to some of the quartz. The specimen weighs 4.1 lbs and comes with pictured display stand.

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
4.3" wide
CATEGORY
ITEM
#59475