“A group of blue quartz crystals on colorless quartz. The blue color is most likely generated by microscopic shattuckite crystals within the quartz Crystal. Shattuckite is independently found at this locality. It appears that this variety of quartz is a first to be listed for California. Specimen collected 6/24/10 by Robert E. Walstrom from the upper dumps. Photo: Dino-Lite AD-4013TL plug-in digital. ”