Research
Research
15 March 2024
15 March 2024
Comparison of Emeralds from the Chitral District, Pakistan, with other Pakistani and Afghan Emeralds
Emeralds from various deposits in Pakistan (Chitral, Swat and Khaltaro) and Afghanistan (Panjshir and Laghman) were examined and compared. In addition, we compared the...
Research
6 February 2024
6 February 2024
Moldavite from Chlum, Czech Republic: Mining and Gem Properties
One of the most well known and popular natural glasses is moldavite, which formed during a meteorite impact about 14.8 million years ago. Today, moldavite is mainly obtained from...
Research
5 February 2024
5 February 2024
Spectroscopic Investigation of Colour and Colour Modification as a Major Topic of Gemstone Research at the DGemG and DSEF
As long as people have adorned themselves with gemstones, they have also tried to enhance the beauty of these natural products. Treatment options have been used for centuries to...
Research
5 February 2024
5 February 2024
On the Colour Mechanism of Blue Gahnite from Nigeria
Gem-quality blue gahnite from Jemaa in central Nigeria has gemmological properties (RI and SG) and a chemical composition indicating relatively pure gahnite (90.7–91.3%). The...