Rock Creek, Montana—Potentate Mining has unveiled a 64.14-carat sapphire recovered at its Rock Creek mine in Montana. The mining company believes it to be the largest gem-quality sapphire to be unearthed in the U.S. Dubbed the “Ponderosa Sapphire” to evoke images of the West and as an ode to the ponderosa pines on the mine’s […]

The post Potentate Mining Unveils 64-Carat Montana Sapphire appeared first on The Jewelry Magazine.