01/08/2003 Beryllium treatment of fancy sapphires with a new heat-treatment technique (Part B)ShareEmailTwitterFacebookGoogle +PinterestTumblrLinkedinVkontakte Authors: Adolf Peretti, Detlef Günther, Anne-Liese Graber Published in: Contributions to Gemmology No. 2Download Publication 09/09/2015 Ruby, Sapphire