Diamond Grading – The AGSL Way (part five) *The following article provides an overview of the American Gem Society Laboratories approach to cut grading of princess diamonds, and was written in collaboration with the AGSL. Special thanks to Peter Yantzer in providing information and insight, Rachel Stark for provi...
AGS Laboratories – Diamond Cut Grading The Princess Cut VIEW POST
Tiffany solitaire diamond ring • photo by WP Diamonds You bought a well-known branded jewelry item, and now you’re looking to resell it. How does the item fare in the secondary market? Does the brand’s consumer image translate to extra dollars for you? The brand’s equity value comes into play here. Unders...
There have been inconsistencies and vagueness about how diamond dimensions are defined. This clarifies the terms and differences and suggests better alternatives. Due to QWERTYism* none of this will change. Star Dimensions The GIA Diamond Course (1974 for me), described the table and stars of a round br...
The Probable Reason Garry Holloway1 was the first to suggest a meaningful explanation for this: he suggested that, because there is a small difference between pavilion main & half facet slopes (less than 2º in a typical round brilliant), this may cause one to be dark when the other is bright – producing contras...
Why are the ‘Best’ Cuts on the Edge of the Table-Bezel Zone? VIEW POST
Diamond Grading – The AGSL Way (part four) *The following article is part of a series written in collaboration with the American Gem Society Laboratories. Special thanks to Alethea Inns, C.G., Director of Diamond Grading at AGSL for her technical contributions.. Diamond clarity gradin...
I get questions about this often and thought I would present something of an answer. Simulants are a different thing, and most of them ARE pretty cheap, but colorless and near-colorless lab-grown diamonds are pretty close to the prices of their natural counterparts. This often comes as a surprise, because people ha...
Fancy Vivid Yellow - "The King of Yellow Diamonds." This article will delve into the world of these most highly prized yellow diamonds. Fancy Vivid Yellow diamond Yellow Diamond Color Scale At one end of the lettered color scale, which many readers know starts at D, is a totally colorless diamond....
Diamond Grading - The AGSL Way (part three) *The following article is part of a series written in collaboration with the American Gem Society Laboratories. Special thanks to Alethea Inns, C.G., Director of Diamond Grading at AGSL for her technical contributions.. A diamond’s color (or lack thereof) is a critic...
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