See Gem As
Tools
Research
De Beers Natural versus Synthetic Diamond Verification Instruments
Two instruments have been developed at De Beers DTC Research Centre, Maidenhead, to distinguish synthetic diamonds from natural diamonds.
Summer 1996 Gem News International
A compilation of gem news from around the world, covering topics such as localities, unusual gem materials, market news, new products, discoveries, jewelry manufacturing techniques, and industry trends.
A History of Diamond Sources in Africa: Part II
This article explores the mining developments and new diamond occurrences in Africa that led to many of the key concepts in modern geology.
A Chart for the Separation of Natural and Synthetic Diamonds
Exploration of a chart designed to give jewelers and gemologists a practical guide to identifying synthetic diamonds as they enter the jewelry trade.
A History of Diamond Sources in Africa: Part I
For more than 100 years, Africa has produced large commercial quantities of diamonds and important individual stones.
A Visual Guide to the Identification of Filled Diamonds
This article illustrates the various features in filled diamonds and explores the best techniques for examining them.
De Beers near Colorless-to-Blue Experimental Gem-Quality Synthetic Diamonds
De Beers has produced a faceted synthetic gem-quality diamond that could go unrecognized without careful gemological testing.
Diamond Sources and Production: Past, Present, and Future
Diamond production’s future appears to belong less to Africa and more to Australia, Canada, and the Russian Federation, according to this overview of geologic trends in the industry.
Age, Origin, and Emplacement of Diamonds: Scientific Advances in the Last Decade
Although certain concepts about the age and formation of diamonds have been known for some time, this overview of advances over the decade leading up to the early 1990s have expanded the scientific understanding of this fascinating topic exponentially.
The Characteristics and Identification of Filled Diamonds
This article reports on the study of six diamonds, both before and after a filling treatment, and the examination of 12 additional filled stones.
The Gemological Properties of the De Beers Gem-Quality Synthetic Diamonds
Examination of a group of 14 brownish yellow, yellow, and greenish yellow synthetic diamonds reveals distinctive gemological properties.
Gemstone Durability: Design to Display
A treatise on the design, display, care and repair of fine gemstones.
