A Foundation for Grading the Overall Cut Quality of Round Brilliant Cut Diamonds
The GIA diamond cut grading system described here includes the components of brightness, fire, scintillation, polish and symmetry, as well as weight and durability concerns, into a single overall grade for cut quality for standard round brilliants.
GE POL Diamonds: Before and After
This article explores and identifies the changes that type IIa GE POL diamonds experience before and after HPHT annealing.
Gemstone Durability: Design to Display
A treatise on the design, display, care and repair of fine gemstones.
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
Modelling the Appearance of the Round Brilliant Cut Diamond: An Analysis of Fire, and More about Brilliance
This second major article in a three-dimensional modelling study analyses fire – the visible extent of light dispersed into spectral colours.
The Cullinan Diamond Centennial: A History and Gemmological Analysis Of Cullinans I And II
Eight decades after the Cullinan diamond was mined, a team of gemmologists examined the two famous gems that were created from it to become part of the Crown Jewels of England.
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.
A Chart for the Separation of Natural and Synthetic Diamonds
Exploration of a chart designed to give jewellers and gemmologists a practical guide to identifying synthetic diamonds as they enter the jewellery trade.
Latest-Generation CVD-Grown Synthetic Diamonds from Apollo Diamond Inc.
High-quality CVD-grown diamonds, comparable in colour and clarity to natural diamonds, can be identified using a combination of gemmological and spectroscopic properties.
A Report on the New Watermeyer Split-Facet Diamond Cuts
Introducing a new technique in diamond cutting that virtually eliminates the "bow-tie" effect.