Cabbing Rough > Opal Macedonian Opals Lapidary Gemstones Cabs Rough Good sized GREEN OPAL cab or possibly facet rough gemstones chunky comparable to chrysoprase Raw uncut lapidary chunks jewelry cabs grade Opals Lapidary Gemstones Cabs Rough http://facetroughgemstones.com/gem-store/product_info.php/products_id/4339