Youtor
Tenebrescent Sodalite Hackmanite
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=0vZW_DUFDYU
Tenebrescent sodalite from Greenland - Upon exposure to SW UV (UVC) the sodalite (also known as hackmanite) changes color to a dark purple. This is tenebrescence and is a reversible effect. The color can be faded by a bright light, and the effect can be repeated over and over. The sodalite is also fluorescent a bright orange under LW UV, and under SW UV the glow gradually darkens to a rusty color due to this tenebrescence. Visit http://www.minershop.com for more information and examples of this and other rare Greenland minerals.
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