A real Opal Stone is a hydrated amorphous form of Silica with a chemical formula (SiO2?nH2O). About its amorphous structure, this stone is classified as a mineraloid. This stone is deposited at very low temperatures? and can be found in the fissures of various rocks such as limestone, sandstone, basalt, etc. The stone has an impeccable appearance and has been used in the ornamental industry for its vivid looks
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