Overview :Collectors have long admired uranium and thorium minerals for their brilliant colors, intense ultraviolet fluorescence, and rich variety of ... Read More
Overview :Among rock-forming minerals, the colorful tourmaline group is a favorite of both mineral collectors and gemologists. Superb examples are fou... Read More
Overview :Quartz is prized by both mineral collectors and lapidary artists. Over 130 vivid photographs of these beautiful minerals are presented to sh... Read More