Mineral Cup<p><a href="https://mastodon.social/tags/Abelsonite" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Abelsonite</span></a> straddles the boundaries between biology and geology, the only known crystalline geoporphyrin. Found in fractures, vugs, and the bedding planes of oil shale, this mineral aims to shock with brilliant reds to grey-toned purple crystals with a pink streak. Abelsonite was discovered under a century ago, and first synthesized just twenty years ago.</p>