Image: Botryogen-Gypsum-199664

Original image(800 × 652 pixels, file size: 145 KB, MIME type: image/jpeg)

Description: Botryogen, Gypsum (Var.: Gypsum)

Locality: Sierra Gorda District, Tocopilla Province, Antofagasta Region, Chile (Locality at
Size: 9.0 x 7.7 x 6.4 cm.
Bright, cherry-red crystals of gypsum to 2.5 cm are colored by rich inclusions of the rare species botrygen, in this unusual specimen that is both historic and beautiful. Note how the best included areas show crystals, acicular needles, of botrygen shooting through the selenite. The little cavity with the major crystals is protected, and host also to freestanding botrygen crystals around the selenite terminations. Ex. Philadelphia Academy of Sciences Collection.

Author: Rob Lavinsky /
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC-BY-SA-3.0
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Attribution Required?: Yes

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