Orangy Topaz that Fades Dramatically on Exposure to Light

L. Allen Brown of All That Glitters had seen large Orangy Topaz online back in 2005 that was said to originate in Brasil and was supposedly untreated. Upon seeing this material in Chantaburi, Thailand in November of 2006, two parcels were purchased. One parcel was placed into the sun where it proceeded to fade quickly to a beige color - very attractive, bright sparkly and brilliant gemstones, but no longer the color that had been originally purchased.


In contacting GIA in California, the other parcel was sent to the GIA office in Thailand where it was studied in their lab. To read this story, you may visit the following link:
http://www.gia.edu/research-resources/gems-gemology/issues/fall2009-contents/fall-2009-featured-gni.html


Thanks to GIA for providing the above link so the trade and public could learn more about this material.