Dims: 2.6 x 1.7 x 1.0" (6.7 x 4.4 x 2.6 cm)
Wt: 1.3 oz. (38 g)
Soda Lake, San Luis Obispo County, California, U.S.A.
This cluster of Thenardite tablets is in very good condition, though it shows some weathering at one end. It contains tetragonal tabular crystals that reach dimensions of 0.8 x 0.5 x 0.2" (2.0 x 1.2 x 0.5 cm). They have a gray-black color due to intense inclusion and a waxy luster, and show dim transparence along their edges. There is no host rock present.