*Note: Please make sure to right-click and print (or save) ID card located in the photo gallery for your records*
A deeply tenebrescent hackmanite specimen with unusual minerals and many colors. This specimen has a mix of bright fluorescent sodalite, green chkalovite and some minor spots of polylithionite.
The material from this locality is probably the winner in the color-change department. Brightly fluorescent both SW and LW - the natural color deepens to a light pink upon exposure to LW UV (or obscure sunlight) and to a deep purple (almost black) after exposure to SW. (Thus the nickname “Red Sodalite”.)
Upon exposure to SW UV the sodalite on this piece changes color to a deep purple - in seconds! Expose it to a bright white light (UV free halogen or LED spotlight held directly on the rock) and it reverts back to its natural color almost immediately.
The animation shows the color change (tenebrescence) after exposure to longwave and shortwave UV.
