Research News
Comments on: “A Question Concerning Heat–Treated Blue Sapphires,” By John I. Koivula and Alethea Inns
John L. Emmett, Crystal Chemistry, Brush Prairie, Washington
A response to the July 24 "News from Research" entry on gemological characteristics related to certain heated blue sapphires. Download PDF to view.John L. Emmett
Crystal Chemistry, Brush Prairie, Washington
