306.22
Colemanite, Pararealgar
Extension 2, U.S. Borax Mine, Boron, Kern Co., California, USA | 2.3 cm
Ex. Vince Morgan, Jim & Dawn Minette, Alex Schauss, Jim Houran, Kyle Kevorkian.
Illustrated in The Minette Collection (2010), pg. 61
Jingnan Zhang photo