obsidian Definition

chalcedony, chert, aventurine, carnelian, azurite, smoky quartz, lapis, peridot, malachite, jade, quartz, citrine, labradorite, sunstone, flint, lithic, arrowheads, nephrite, volcanic glass, concretions, beryl, cabochons, basalt, soapstone, cinnabar, electrum, agates, amethysts, metamorphic rock, volcanic rock, garnets, conodonts, ocher, adzes, tufa, jasper, igneous rock, potsherds, microfossil, alabaster, quartzite, spear thrower, verdigris, neolithic age, mousterian, jadeite, awls, striations, faience, chiton, tourmaline, tesserae, semiprecious, copal, chrysocolla, openwork, opals, earthenware, cuprite, realgar, calcic, nacre, vermeil, middle paleolithic, ultramarine blue, pictographs, coprolite, etruscans, mica, marcasite, toltecs, geode, aragonite, inlaying, corundum, calcite, pontil, travertine, basketry, pewter, petroglyph, feldspar, celadon, metate, gorget, burl, alexandrite, kyanite, sharkskin, silverwork, topaz, praseodymium, birch bark, cloisonne, prehistoric, sandstone, engravings, lavas, topazes, phlogopite,