Description: Gold Group formed by crystals of perfectly defined faces and edges and has hoppered growth on the areas corresponding to the octahedron faces. Colorado Quartz Mine, Mariposa County, California, USA Specimen size: 1.9 × 1.4 × 0.6 cm. Main crystal size: 1 × 0.9 cm. Photo: "Reference Specimens"

All pictures, text, design © Forum FMF 2006-2025