Fluor-buergerite
Fluor-buergerite occurrence, Mexquitic de Carmona Municipality, San Luis Potosí, Mexico
2.1 x 1.6 x 0.8 cm. A fairly rare member of the tourmaline group, this specimen on matrix is composed of several, doubly-terminated, prismatic crystals of lustrous, bronze-colored crystals to 1 cm in length. Notice the fascinating golden sheen effect on the surface. From the type locality at Mexquitic, San Luis Potosi, Mexico. Few were found, and ...
© Rob Lavinsky & irocks.com