A Geoscience Digital Image Library

TitleTrona from Searles Lake, California, USA
DescriptionTrona, Na3(HCO3)(CO3)·2H2O, is the most well known of several sodium carbonates that form in non-marine evaporite deposits. They are often difficult to distinguish from each other. These minerals form in playa lakes (such as Searles Lake, where this sample comes from), as efflorescent crusts on the walls of caves and mines, or in soils in arid regions. Note scratches due to irresponsible students checking for hardness. Trona is mined as a source of sodium oxide for glass making. This sample is about 9 cm in longest dimension.
LocationUSA ▹ California ▹ San Bernardino. Near Trona. Searles Lake.
PhotographerTwyla Baker. 2001-06-06.
CollectionUniversity of North Dakota Mineralogy Collection #1918.
Key wordstrona
Tech details820 KB. Hand specimen. Fujifil FinePix S1 Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number654