Description
You will receive ONE blue sodalite var Hackmanite specimen from the Kokcha Valley, Badakshan Afghanistan. The blue hackmanite specimens generally do not show much tenebrescence (color change). These stones show a very slight lavender color after UV exposure.
A 365 nm AloneFire long wave flashlight was used in the fluorescent photos.
Location: Badakhshan, Afghanistan
Size: Approximately 4.5 to 5 cm each. Approximately 35 to 46 grams each.
Tenebrescence is the ability of some materials to change their color when exposed to sunlight. This phenomenon is also known as reversible photochromism, because the color change can be reversed by removing the light source. Tenebrescence is not intrinsic to the material but is induced by irradiation with X-rays or other forms of energy. Some minerals, such as hackmanite, exhibit tenebrescence and can change from colorless to pink, purple, or blue when exposed to sunlight.