Rock & Mineral Encyclopedia

Search and identify 1,000+ rocks, minerals, crystals, and gemstones — with properties, formation, colors, hardness, and how to tell them apart.

Orange Opal

A vivid orange opal, classically Mexican fire opal, prized for its bright, fiery body color that glows when backlit.

A hydrated silica gemstone famous for its shimmering play-of-color, ranging from white and black opal to fiery orange fire opal.

An opal with warm sunset hues of orange, amber, and red, prized for its glowing fiery body color reminiscent of dusk skies.

A glowing orange-to-red opal whose warm body color resembles flame; some stones add flashes of play-of-color.

A translucent to transparent opal in warm yellow, orange, and red tones, prized for body color rather than play-of-color.

A gentle peach-to-apricot opal, mostly common opal colored by trace iron, prized for its soft warm pastel body.

A transparent to translucent opal prized for its glowing orange-to-red body color, mined chiefly in the volcanic highlands of Mexico.

A man-made opalescent glass that glows milky blue in reflected light and warm orange when backlit, often sold as a crystal.