Ulexite-Calcite-40062

Autor:

Robert M. Lavinsky

Shortlink:

https://czwiki.cz/b/d4541

Zdroj:

Wikimedia Commons

Formát:

457 x 600 Pixel (78543 Bytes)

Popis:

Ulexite, Calcite

Locality: Boron, Kramer District, Kern County, California, USA (Locality at mindat.org)

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. The longest crystal is 6 cm high. 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 6.9 x 5 x 3.1 cm

Licence:

CC BY-SA 3.0

Credit:

http://www.mindat.org/photo-40062.html

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