Fire opal, the bright red, reddish-yellow, orange, or brownish-red body colored opal is the second most important opal commercially. Until recently, the best fire opal came from
Mexico. Arizona.--Two commercial mining operations in Arizona produce blue precious
opal. The body color is a light or pale blue with strong play of color in red, blue, green,
and orange. The two operations sell most of its material as finished stones at the Tucson
Gem and Mineral show and other local gem shows.