Fluorescent & Phosphorescent Cave Calcite Specimen window and gives the quartz a

and gives the quartz a subtle hue that resembles the color of bone

We have 4 sizes available

Locality: Stari Trg Mine

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

This phenomenon is also known as reversible photochromism

Fluorescent & Phosphorescent Cave Calcite Specimen window and gives the quartz aCave 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