Ulexite, Calcite

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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