Video of Tenebrescent Sodalite (Hackmanite) and Tugtupite

 Sodalite from Greenland (hackmanite) will darken in color when exposed to shortwave ultraviolet light (or sometimes just sunlight).  When exposed to this UV they fluoresce brightly.  Once the UV is removed they have turned a darker color, some a deep purple.  When exposed to a bright white light they will fade back to their original color rather quickly.

 

Tugtupite experiences this same phenomenon.  UV causes it to turn a beautiful red color - and makes it a valuable gemstone.  It does not fade as rapidly as sodalite, sometimes not fading at all or very little.

 

The video below shows this process.  The three pieces on the right are tugtupite (reddish colors) and the three on the right are sodalite (they will all have a grape/purple color when tenebrescent).

 

Please reload

Recent GlowNotes Posts

Please reload

Visit the GlowNotes Blog to view more - educational posts, equipment, minerals, photography and displays

Related Posts:

Please reload

Email comments or suggestions:

Home

RSS Feed
  • reddit
  • Facebook Social Icon

Subscribe to our RSS (Real Simple Syndication) feed to get new posts delivered directly to your desktop!

Nature’s Rainbows is a non-commercial web site maintained entirely by volunteer hobbyists and contributors.  Our mission is to provide information about UV and luminescence, premium fluorescent mineral photos, and a fluorescent mineral database for the enjoyment of FL mineral collectors around the world.  Information on this web site is covered under a Creative Commons License.


Feel free to contact us with comments and suggestions.

Like us on Facebook!