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 Main Menu > GeoGallery > Gems > Mexican Fire Opals 
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Mexican Fire Opals Opal is a noncrystalline hydrated form of silica, forming when silica slowly settles out of a dilute water solution. Fire opals are transparent to semi-transparent, resembling gelatin, with red, orange, or yellow body color, with or without play-of-color. The body color is caused by inclusions of iron oxides. They are also sometimes called Mexican opals because most of the best fire opals are found in Mexico.
Image Number: 95-40493 |
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