Fluorescent & Phosphorescent Cave Calcite Specimen Style:B There is a fracture that

There is a fracture that is stable

for both mineral collectors and "philosophers of the unseen

photochromic / tenebrescent (changes to a deeper shade when exposed to sunlight or certain other light sources)

including Trepca

There is a minor amount of unknown blue mineral in a small groove at the bottom edge of the termination

Fluorescent & Phosphorescent Cave Calcite Specimen Style:B There is a fracture thatCave calcite specimens with fluorescence and phosphorescence (glows for a short time after the UV light is turned off). These are from Balochistan, Pakistan. Choose the style you would like when adding to cart. A 20 grams approx 68 mm B 18 grams approx 50 mm C 14 grams approx 48 mm D 10 grams approx 35 mm E 6 grams approx 39 mm