KINGMAN SPIDERWEB Turquoise BIG Cabochon Cab NATURAL 28mm Waterweb. This is 100% Natural material. AA Natural Gem Grade KINGMAN SPIDERWEB Turquoise, a. We have to cut a LOT of this material to get a cabochon that looks like this!! This small collection is from our “MINERS CUT” KINGMAN BLACK WEB Material. The material can go from a “Robin’s Egg” blue all the way to a deep dark “Lander” blue. This Collection includes gems with a high percentage of silvery iron pyrite matrix, and deep dense black spiderweb. This material was Mined in the 1950’s, and is no longer available. This is a BIG, THICK, “BIG DADDY” Stone! (This stone is the perfect size for a pendant, or bracelet)!! These are the EXACT Stones we give our Artists to make jewelry with, there is not difference in quality or value. Mine- Mojave County, Kingman Mine, ARIZONA Origin- Arizona, USA Treatment- 100% Natural. Size/Carats- (30.6 Carats) 28mm x 25mm. Each Gem comes with its own GEM JAR! Get images that make Supersized seem small. Showcase your items with Auctiva’s. Track Page Views With.