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An opal is a hydrated form of silica with a water content ranging from 3 to 21%.Indeed, it is this permeability to water that makes it a hydrophile.
Opals are deposited at a relatively low temperature and may occur in the fissures of almost any kind of rock, being most commonly found with limonite, sandstone, rhyolite, marl, and basalt. Precious opals show a variable interplay of internal colors.
- Mineral Form/ Type Meteorite
- Cts 2.40 Natural Australian Solid Opal
- Natural Australian Opal
- 6×4×2 mm
- 0.48 g
- Origin (Region/ City)
- Cobeer Pedy
- Origin (Country)