Fire opal is the orange variety of opal that is found primarily in Mexico, although recently Brazil has been producing some fine gems. The colors range from a pale yellow through the oranges to almost red, called cherry orange. Fire opal is the only variety of opal that is commonly faceted (because of its clarity). A rare variety has a play of color inside the gemstone, this is referred to as precious fire opal. Opal is the birthstone for October. More Information on Mexican Fire Opal can be seen here. Finished Mexican Fire Opal jewelry can be seen here.