Crystallized acanthite (4.0 × 2.5 × 1.5 cm) from Imiter mine, Jbel Saghro mountain range, Tinghir Province, Drâa-Tafilalet region, Morocco
<a href="//commons.wikimedia.org/wiki/User:Iifar" title="User:Iifar">Ivar Leidus</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>