Colour Grading “D-to-Z” Diamonds at the GIA Laboratory
This article discusses the history and ongoing development of GIA's colour grading system, and explains how its laboratory applies it.
A History of Diamond Treatments
Modern gemmologists and diamantaires are faced with a broad spectrum of colour and clarity treatments ranging from the simple to the highly sophisticated.
Global Rough Diamond Production Since 1870
Historically, global rough diamond production has fluctuated greatly due to a myriad of causes, many of which are explored in this article.
Fingerprinting of Two Diamonds Cut from the Same Rough
With the information from a combination of tools now available, the sophisticated gemmologist can fingerprint a given stone.
Modelling the Appearance of the Round Brilliant Cut Diamond: An Analysis of Brilliance
A mathematical model which can analyse how appearance factors depend on proportions.
The Rise to Prominence of the Modern Diamond Cutting Industry in India
this article reviews the rise of the modern diamond cutting industry in India and its impact on the world diamond trade
Modern Diamond Cutting and Polishing
Over the last 25 years, the diamond-cutting industry worldwide has been revolutionised by sophisticated instruments that provide invaluable aid in the process of creating a polished gem.
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.
Gemstone Durability: Design to Display
A treatise on the design, display, care and repair of fine gemstones.
Pitfalls in Colour Grading Diamonds by Machine
Two major sources of error make spectroscopically determined colour grades unreliable.