GemTOF Analyses of Sapphires from Madagascar and Kashmir
In the beginning of 2017, gem testing laboratories started to receive cut stones from a new area for gem analysis and issuing reports. As stated in a trade-alert by SSEF in early 2017, some of this new sapphire material may resemble internal features of Kashmir blue sapphires, therefore careful microscopic inve
Origin determination and traceability: An overview for gemstones (2019)
Origin determination and traceability: An overview for gemstones (2019)
Multi-Element Analysis of Gemstones For Country of Origin Determination (2019)
Presentation at IGC 2019 in Nantes (France) by Dr. Hao Wang.
The Talisman of Charlemagne: New Historical and Gemological Discoveries
The Talisman of Charlemagne: New Historical and Gemolog […]
Gemmological Analysis of a Roman Sapphire Intaglio and Its Possible Origin
Gemmological Analysis of a Roman Sapphire Intaglio and […]
SSEF Fieldtrip to Paraiba, Brazil (2018)
Presentation given by Alexander Klumb at 2018 Swiss Gemmological Society conference on an SSEF fieldtrip to the Paraiba region of Brazil.
Origin determination and traceability: An overview for gemstones
Origin determination and traceability: An overview for […]
Spinel from Mogok, Myanmar—A Detailed Inclusion Study by Raman Microspectroscopy and Scanning Electron Microscopy
Spinel from Mogok, Myanmar—A Detailed Inclusion Study b […]
Sapphires from Ambatondrazaka, Madagascar
Madagascar, an island of many gem treasures, saw in recent months another ‘sapphire rush’ after the discovery of a new gem deposit about 35 km east of the small town of Ambatondrazaka.
Sapphires from a New Deposit at Bemainty near Ambatondrazaka in Madagascar
Sapphires from a New Deposit at Bemainty near Ambatondr […]