“Large specimen consisting of brightly fluorescent ruby crystals in an unidentified matrix, seen under long wave UV (365 nm). This specimen is from an unidentified mine in the Mysore District, Karnataka, India. The matrix also shows a pale blue/white response under long wave UV.”

“Same specimen, shown under visible light. Raspberry red colored, hexagonal crystals of corundum (var. ruby) in a granite-like matrix, from an unidentified mine in Mysore, India.”

“Close-up of one of the larger individual ruby crystals (approx. 19 mm in lenght), seen under long wave UV.”

“Close-up of one of the larger individual ruby crystals (approx. 19 mm in lenght), seen under visible light.”