Corundum (Var: Ruby)
Thumbnail, 6.7 x 4.8 x 4.5 cm
Luc Yen, Yenbai (Yen Bai) Province, Vietnam

A large, lustrous, weirdly shaped crystal of ruby on matrix, measuring 2.5 cm across. The crystal is complete and undamaged, and shows lots of shiny faces, despite its odd form. There is a second crystal nearby, and some accenting muscovite. 6.7 x 4.8 x 4.5cm