Heated Sapphires With Unstable Color Centers

Journal of Gemmology
Written By Precious Braswell
Evidence of high temperature heat treatment. Photomicrograph taken by Christopher P. Smith; magnified 48x.

Evidence of high temperature heat treatment. Photomicrograph taken by Christopher P. Smith; magnified 48x.

Recent research by Christopher P. Smith and the team at American Gemological Laboratories (AGL) regarding heated sapphires with unstable color centers has been published in The Journal of Gemmology, Volume 36, No 7, pp 602-604.

To download a copy click here

JoG_V36_No+7_Heated+Sapphire+with+Unstable+Colour+Centres_KR1.jpg
JoG_V36_No+7_Heated+Sapphire+with+Unstable+Colour+Centres_CPS-2.jpg
JoG_V36_No+7_Heated+Sapphire+with+Unstable+Colour+Centres_KR3.jpg
Precious Braswell
Previous

Titanite (Sphene) Inclusions in Ruby Identified by Infrared Spectroscopy
Next

Pyrite and Chromite Inclusion Assemblage in Emerald