opal Definition

gemstone, gem, moonstone, hyalite, girasol, roa, geyserite, menilite, phytoliths, amethyst, topaz, citrine, ruby, peridot, quartz, beryl, chalcedony, smoky quartz, aquamarine, morganite, spinel, diamond, iolite, zircon, lapis, tanzanite, tourmaline, pearl, alexandrite, onyx, corundum, aventurine, amber, semiopal, opaque gem, transparent gem, cacholong, fire opal, water sapphire, chloropal, nephrite, feldspar, carnelian, semiprecious, jasper, jade, pendeloque, azurite, cabochons, mica, garnets, labradorite, jadeite, white sapphire, agates, corundom, tsavorite, sapphires, succinite, feitsui, emerald, lapis lazuli, garnet, hematite, geode, ammonite, emeralds, sapphire, smaragdine, moss agate, vermeil, greenstone, kyanite, chrysoprase, balas ruby, metamorphic rock, birthstone, obsidian, marcasite, mineral, quartzite, cinnabar, rose quartz, calcite, argillite, cultured pearl, basalt, spinifex, chrysocolla, essonite, rubicelle, pearl grey, scheelite, gemmeous, iron pyrite, blue john, haematite, cowrie, adularia, ochres,