Large spay of compact sorensenite crystals. Sorensenite is known to fluoresce white/grey under...
Apophyllite on matrix, possibly two generations: a larger triangular crystal (cleaved or broken)...
Very nice sample of hokkaidoide grains embedded in opal. Under longwave UV light the hokkaidoide...
Halite & Gypsum var selenite. Nice association, in particular under UV light: the halite...
Yellow carpathite crystals coated by quartz. Quite nice how some crystals are fully exposed, some...
Tenebrescent tugtupite: normally pink, it changes color to a darker red upon exposure to UV light....
Kyanite blades in matrix. Lot's of them! In daylight they are essentially colorless, white or...
Little plate of pink rhodochrosite crystals, all packed together. Contrary to every guess, the...
Glauberite crystal, fluorescent light blue under shortwave UV light, pink under longwave...
A very rich piece of yellow idrialite and red cinnabar. Some nice little crystals are visible with...