5384 Calcite, Chenzhou, Hunan Province, China

Yellow calcite with bluish-white fluorescence (Convoy) and a green afterglow that takes a few seconds to fade. Colours are not exact in photo (iPhone). Also, compared to the many many calcite specimens from Chenzhou in...

4571 Silver, Almería, Spain

A small mass of silver crystals. Exact locality is unknown. Ex Bob Rothenberg. Ex Al Pribula. Width of view 2.33mm. Stack of 50 images. Click on the image below for a higher resolution version.

300128 Iodine

Iodine in sealed glass ampule. Paul van den Bergen photo. And thanks to Paul for creating this… 😁