Why opals crack is one of the most common questions new buyers ask, and the real answer usually comes down to basic geology and climate, not bad luck or a low-quality stone. Opal is not a crystal like a diamond or a sapphire. It is made of tiny silica spheres packed together with ...Learn More

Natural Raw Ethiopian Opal - Welo Rough Opal Stone with Blue & Green Fire https://armoniagems.com/collections/raw-ethiopian-opal The dominant blue fire in this raw opal stone is produced by smaller silica spheres within the stone's internal structure. In opal, different ...Learn More