Buying an opal is like purchasing a piece of a rainbow. Unlike traditional faceted gems, opals are valued for their —a shimmering, multi-coloured fire caused by light diffracting off microscopic silica spheres. 1. Know the Primary Types
: Found in ironstone boulders; the opal is often left attached to its dark host rock, giving it a natural, rugged look and high durability. buy opal stone
: Graded from N1 (black) to N9 (white). Generally, the darker the base, the more valuable the stone. Buying an opal is like purchasing a piece of a rainbow