Search Archived Mineral Specimens
- Featured in Special Editions
- Boron, Kern Co., California, United States
- SmCabinet 8x6x4cm
- Ore Minerals
The Borax mine in Boron, California is operated by Rio Tinto and is one of the largest Borax mines in the world. Borax was discovered in California in 1872. The Borax mine was established in the 1920's. About 74% of the borax produced is used in glass and ceramics, while another 6% is used in soaps and detergents. Borax is also used in a multitude of other applications. A noted quote by W. T. Schaller in 1930: "The cleanser, the pharmacist, the paper and textile maker, the metallurgist, the brazier, and the jeweler all use borax". These are still valid applications today. Colemanite is a main ore of borax as is Ulexite. Borate deposits probably originated from the concentration of boron rich sediments in large playas as brines. The boron probably was derived from hot springs and fumaroles associated with Tertiary age volcanics. This is a good specimen with large crystals over 1cm in size.
- Death Valley, Inyo Co., California, United States
- SmCabinet 4.5x6.5x4cm
Cluster of incredibly sharp Colemanite crystals to 2.5cm with white or colorless centers and honey-colored terminations.