
Pargasite and Diopside, Franklin Quarry, Franklin, New Jersey
This rock contains large grains of green pargasite and grey-white diopside, and is quite attractive under both UV and visible light. It...

Ruby Crystals in Matrix, Mysore, India
This corundum specimen from Mysore, Karnataka, India is especially rich in brightly fluorescent ruby crystals. The luscious, velvety red...

Diopside and Calcite, Pitwak Mine, Sar-e-Sang, Badakhshan, Afghanistan
This exceptional fluorescent specimen consists of numerous blocky diopside crystals encrusted upon and embedded within a calcite-marble...

Yttrofluorite, Joseph Mine, Rio Arriba County, New Mexico
Yttrofluorite is a variety of fluorite in which the rare earth element yttrium substitutes for some of the calcium in the fluorite (CaF2)...