A Geoscience Digital Image Library
A Geoscience Digital Image Library
| Title | Gerstleyite and probertite from Kern County, California |
|---|---|
| Description | This sample is 8 cm across. Much of it is probertite [NaCaB5O7(OH)4·3H2O], a borate mineral that in this sample forms radiating blades (lower left end of specimen) and a white crust. It may also form as extremely delicate, bright white, acicular balls. Minor reddish-brown gerstleyite [Na2(Sb,As)8S13·2H2O] is also present. Both minerals crystallized in a grayish clay matrix. This sample comes from the Baker Mine, Kramer district, Kern County, CA, a locality known for a number of relatively rare minerals. |
| Location | USA ▹ California ▹ Kern County. Near Boron. Baker Mine. |
| Photographer | Darla Sondrol. 2001-06-27. |
| Collection | University of North Dakota Mineralogy Collection #62. |
| Key words | gerstleyite, probertite, California |
| Tech details | 480 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens. |
| GeoDIL number | 911 |
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