Yellow chrysoberyl transmission and fluorescence

Note: This explanation and the stone identification was changed on 17 May 2017. The original identification with topaz was incorrect.

The transmission and fluorescence of yellow chrysoberyl. The three images show, from left to right, white light transmission; fluorescence with 404nm laser excitation and the fluorescence viewed through a yellow filter to remove the blue laser light. The red fluorescence is due to chromium and possibly vanadium impurities Cr3+ and V2+ replacing Al.

Flickr page for this photo.

Visit the Eye for Science Flickr group.

Get the "Eye for Science" widget here and install it on your own blog. Spread the scienticity!

Like this image? Want it for your smartphone wallpaper?
Use this QR Code to load it on your smartphone and enjoy!