Claudia Zahn<p>Deep purple <a href="https://mastodon.social/tags/Fluorite" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Fluorite</span></a> cubes on <a href="https://mastodon.social/tags/Calcite" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Calcite</span></a> matrix with scattered fine orange <a href="https://mastodon.social/tags/Sphalerite" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Sphalerite</span></a> crystals, from the Elmwood Mine, Carthage, Tennessee, USA.<br>Photo: Fine mineral photography<br>László Kupi<br>By <a href="https://mastodon.social/tags/GeologicalWondersToo" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>GeologicalWondersToo</span></a> / Karen Kemp<br><a href="https://mastodon.social/tags/GeologyPage" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>GeologyPage</span></a> <a href="https://mastodon.social/tags/Nature" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Nature</span></a> <a href="https://mastodon.social/tags/Minerals" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Minerals</span></a> <a href="https://mastodon.social/tags/Crystals" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Crystals</span></a> <a href="https://mastodon.social/tags/Gems" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Gems</span></a> <a href="https://mastodon.social/tags/Nature" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Nature</span></a> <a href="https://mastodon.social/tags/NatureLovers" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>NatureLovers</span></a> <a href="https://mastodon.social/tags/NaturePhotography" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>NaturePhotography</span></a> <a href="https://mastodon.social/tags/Photographer" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Photographer</span></a> <a href="https://mastodon.social/tags/RockPorn" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>RockPorn</span></a></p>