Ulexite, Calcite
Boron, Kramer District, Kern Co., California, USA
Thumbnail, 7.0 x 5.0 x 4.8 cm
The borate deposits of California have produced some really beautiful/oddball mineral specimens. Few are as unusual as ulexite, also called "TV rock" for its fiber-optic-like optical properties. This particular matrix specimen is TERMINATED, something you almost NEVER see in the mineral; and it has superior prismatic luster and a pearlescent, white color. In association are some really neat golden, translucent calcite crystals to 1.0 cm in length. SUPERB FOR THE SPECIES AND very RARE as a specimen, instead of simply as cleavage masses! This specimen is 3-dimensional and complete all around 7 x 5 x 4.8 cm