The North Geronimo Mine, also known as the Pure Potential Mine, is located in the Trigo Mountains, La Paz County, Arizona. The matrix of this piece is calcite and it is broken up with veins of fluorite. It fluoresces under SW LW and MW ultraviolet light and the pictures are presented in that order. 13 ounces 4 x 3 x 2 inches. ISO-100 f/11 0.6 second exposure for UV pictures.