While these pseudormorphs are not the most beautiful things in the world, they are great Mexican classics. That is, IF you can find one of this quality - which is extremely rare. The stibnite looks to have completely altered to stibiconite. The very large crystal is complete, undamaged and un-contacted, and terminated. But, most importantly, there is this beautiful cluster of calcites around the bottom that makes this really unique and aesthetic, since the vast majority of these are just single crystals with no matrix or attachments.