Small Cabinet, 6.2 x 5.7 x 5.2 cm
Thompson Mine, near Ryan, Death Valley National Park, Inyo Co., California, USA
Ex. Al Ordway
A superb example, very aesthetic, of this rare borate! Emplaced on a knoll of matrix is a spiky ball of lustrous and translucent, elongate white crystals, to 1 cm in length, of hydroboracite (a calcium and magnesium rich borate) .