Opal
Opal is a hydrated amorphous form of silica (SiO2·nH2O); its water content may range from 3 to 21% by weight, but is usually between 6 and 10%. Due to its amorphous property, it is classified as a mineraloid, unlike crystalline forms of silica, which are considered minerals. It is 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.
Black Ethiopian Opal 4.20ct (OP005)
₨ 4,200
Blueish Water Opal 2.30ct (OP004)
₨ 2,000
Honey Ethiopian Opal 2.70ct (OP003)
₨ 2,500
Blueish Water Opal 3.10ct (OP002)
₨ 3,000
Blueish Water Opal 3.70ct (OP001)
₨ 3,300