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This Specimen has been sold.
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7.9" Large Chalcedony Filled Geode - Morocco
This is a 7.9" wide geode collected from Morocco. The interior of this beautiful geode is completely filled with chalcedony, which even glows bright white under short-wave UV light! Both halves of this stunning geode are included.
About Quartz
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.
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.
SPECIES
Quartz var. Chalcedony
LOCATION
Morocco
SIZE
Geode Dimensions: 7.9 x 6.4 x 5.3"
CATEGORY
ITEM
#289498
