500g Raw rare hackmanite Photochromic uv 65+pieces spacimen and crystal

Specimens & crystals Weight { 500 } Grams. Shape { raw }. Dimensions{ 9mm-35mm}. Specimens Name { hackmanite}. Treatment {100%Natural }. Origin from........ { Afghanistan }. Hackmanite is a rare variety of sodalite that is distinguished by its ability to temporarily change color, a phenomenon called tenebrescence, when exposed to ultraviolet light. While standard sodalite is typically blue and fluoresces orange under UV light, hackmanite is often a pink to purple color and can glow orange or yellow, and then darken after UV exposure before gradually fading back to its original color. Sulfur content and F-centers within the mineral's structure