Gr. 9,50 Azuriet zilveren ring Ruw - Hoogte: 32 mm - Breedte: 23 mm- 9.5 g

Natural Rough Azzurrite set in an elegant sterling silver ring.
Weight: 9.50 gr.; Ring size: 7 US. Natural and untreated stones.
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Pictures taken with high resolution camera on different backgrounds in order to depict the opals as realistically as possible.

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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.

At microscopic scales, precious opal is composed of silica spheres some 150 to 300 nm in diameter in a hexagonal or cubic close-packed lattice. These ordered silica spheres produce the internal colors by causing the interference and diffraction of light passing through the microstructure of the opal.