Pigeon Blood Red & Royal Blue (2017)
GAHK seminar March 2017 on SSEF criteria for Pigeon blood red & Royal blue by Dr. Michael Krzemnicki (SSEF)
Sapphires from a New Deposit at Bemainty near Ambatondrazaka in Madagascar
Sapphires from a New Deposit at Bemainty near Ambatondr […]
New Sapphires from Ambatondrazaka, Madagascar
New Sapphires from Ambatondrazaka, Madagascar. Publishe […]
Le talisman de Charlemagne: nouvelles découvertes historiques et gemmologiques
Le talisman de Charlemagne: nouvelles découvertes histo […]
Ruby heat treatment and fracture repair
Ruby heat treatment and fracture repair. Published in J […]
Sapphire from Andranondambo, Madagascar
first published in Facette 22 (February 2016) In 2 […]
Origin of gem corundum in calcite marble: The Revelstoke occurrence in the Canadian Cordillera of British Columbia
Origin of gem corundum in calcite marble: The Revelstok […]
Be-detection by FTIR on corundum; a preliminary report
Be-detection by FTIR on corundum; a preliminary report. […]
Some uncommon sapphire “imitations”: Blue Co-zirconia, kyanite and blue dumortierite
Some uncommon sapphire “imitations”: Blue Co-zirconia, […]
