If fantastic collection of red spiderweb, Bisbee Turquoise, cabochons hand, cut by John Hartman from some super grade Bisbee Turq rough. They were a total of 12 cts. We do not treat Bisbee Turquoise that, we feel, is hard enough to cut a stable, durable gemstone. We are also mindful not to use any harsh chemicals in any of the cutting or processing of our Natural Bisbee Turquoise cabochons. John & Estell Hartman have been Bisbee Turquoise since the late 1960’s. John has been cutting Bisbee Turquoise Cabochons since 1972. There is no person that has cut and studied the Bisbee Turquoise mineral near as much as John, that is a fact!