This magical Australian Boulder Opal is blue, no wait, blueish purple.... it just keeps changing and the flecks inside of it are so captivating! It's lit up by the bright yellow 18kt gold it's wrapped in, backed by sterling silver. The chain is 18" solid 18kt. This would make a great everyday piece.
Opal is a hydrated amorphous form of silica (sio2·nh2o). When opal is formed, silica gel fills crevices in rock. As water evaporates, the silica is deposited in the form of tiny spheres. 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.
Opal is the product of seasonal rains that drenched dry ground in regions such as Australia’s semi-desert “outback.” The showers soaked deep into ancient underground rock, carrying dissolved silica (a compound of silicon and oxygen) downward.
Australian Boulder Opal || 18kt yellow gold || sterling silver