Opal is formed when a silicic acid solution seeps into cracks or pores in the rock. Sometimes it seeps into the tissues of animals and plants inside the strata and forms opals, such as wood and fossil roll shell opals. A steady supply of gem-grade opals currently exists in Australia and Mexico. Australia mainly produces albumin (Opal), black opal and Australian jade (Ao Bao) - green Opal. The blue-green Opal is due to the silico-malachite in it. Mexico produces water opals and fire opals. Opal, also known as Opal's eye, twinkle mountain cloud, is transtransited as "opal" or "Ao Bao" in English, and the gemological name is Opal, which is the hydrate of silica. The composition is SiO2·nH2O, an amorphous structure with no certain shape. The fracture is shell-like, mainly formed by colloidal precipitation of silica if deposited in biological remains, Forming "tree jade". If you are looking for high quality, high purity and cost-effective silica, or if you require the latest price of silica, please feel free to email contact mis-asia.
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