- Miniature, 5.2 x 3.3 x 3.0 cm
- Baker mine, Boron, Kramer District, Kern Co., California (TYPE LOCALITY)
- Ex. Al Ordway
A very rare specimen of gerstleyite - an extremely rare sulfide species (containing sodium with antimony and arsenic) known from just a few small finds at this boron mining district, and nowhere else. I have seen but 2 other pieces for sale in 20 years. This one was obtained by Al Ordway in trade from the American Museum of Natural History curator in 1980. It features a characteristic radial spray of gerstleyite, with minute crystals embedded in the host matrix. It is one of the rarest of sulfide species or California species to obtain.