Boulder opal
Boulder opal is the most organic type of gemstone. Being an opal that has a host-rock, the boulder opal forms in veins, fissures and cracks … Read more
Boulder opal is the most organic type of gemstone. Being an opal that has a host-rock, the boulder opal forms in veins, fissures and cracks … Read more
Boulder opal has become a more popular type of opal next to black opal from Lightning Ridge and can reach prices almost as high as … Read more