Radial crystals of prehnite on a rich group of prismatic crystals of ferroactinolite with an intense green color. Together they show a black color, bright, well defined, with flat terminations.
The radial prehnite crystals measure about 3.7 cm in diameter and those of ferroactinolite ± 1 cm.
The sample measures 8.2 x 4.6 x 4.2 cm and is mounted on a 5 x 5 cm base.
Imilchil Area, Anti-Atlas,Er Rachidia Province, Drâa-Tafilalet Región, Morocco
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