Image of an enormous block of <a href="https://en.wikipedia.org/wiki/Smoky_quartz" class="extiw" title="en:Smoky quartz">smoky quartz</a> of the morion variety at the entrance of the <i><a href="https://en.wikipedia.org/wiki/Galerie_de_Min%C3%A9ralogie_et_de_G%C3%A9ologie" class="extiw" title="en:Galerie de Minéralogie et de Géologie">galerie de Minéralogie et de Géologie</a></i> in the <i><a href="https://en.wikipedia.org/wiki/Jardin_des_plantes" class="extiw" title="en:Jardin des plantes">Jardin des plantes</a></i> in <a href="https://en.wikipedia.org/wiki/Paris" class="extiw" title="en:Paris">Paris</a> (Muséum national d'histoire naturelle, Paris, France, inventory number N° 183.1). This specimen is from Victoria da Conquista, Bahia state, Brazil.
<a href="//commons.wikimedia.org/wiki/User:Jebulon" title="User:Jebulon">Jebulon</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>