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Very Fine Mexican Jelly Fire Opal—.  Most fire opal deposits are in Mexico.  They consist of silicon dioxide or silica spheres arranged in an orderly pattern with iron oxide dispersed throughout giving the fire opal its distinctive brilliant flame-like colors. The 3 most important attributes of the fire opal are body colors, transparency  play-of-color.  The greater the play-of-color, the more precious the gemstone.

Very Fine Mexican Jelly Fire Opal—. Most fire opal deposits are in Mexico. They consist of silicon dioxide or silica spheres arranged in an orderly pattern w/iron oxide dispersed throughout giving the fire opal its distinctive brilliant flame-like colors