This piece of Fluorite crystal looks like it might contain the universe. Maybe it does. The blurb at the sales page makes it sound quite special:
The Fluorite crystals are superbly developed as an intergrown group, with stepped form habit to 3.2cm over all the main crystal edges. The lustrous crystal are a rich deep purple to neon purple colour. Thinner areas of the specimen display a translucency with internal colour zoning of purple shades. Tiny micro-crystals of Chalcopyrite are lightly sprinkled over the Fluorite crystals, adding more interest to an already interesting specimen.