Decorative glass is often made to capture the vivid color and intense sparkle of gemstones. It isn’t limited to transparent stones, either. A type of opaque matte glass called opal glass or opaline ...
Fine material with play-of-color is fashioned into cabochons or freeform shapes (figure 3). Lower-end material—essentially rhyolite matrix with gemmy opal portions—is fabricated by hand into cabochons ...