Market of rough diamonds The first major event of the year was last week’s overall 3% price increase by De Beers’. On top of that, sightholders are looking at an extra charge of probably 2%, in order to contribute to De Beers’ promotional budget. All together, this is already an overall increase of over 5...
The AGA-LBI and DFS System With the advent of new technology which is capable of physically measuring light behavior in diamonds, AGA will now use the new AGA Durability-Finish-Size (DFS) system when we also utilize ImaGem light measurements. The original AGA Cut Class system was based on a conservative and tradi...
The NEW AGA Cut Class and AGA-Light Behavior Index with ImaGem CLICK HERE TO VIEW POST
Contrast A chess board is 50% black; it returns half as much light as a sheet of white paper. But a chess board looks brighter than white paper when they are both moving. The same is true for a diamond; if a stone returned light so that the crown was bright all over, it would not appear as bright to your ...
The role of contrast in diamond appearance CLICK HERE TO VIEW POST
The diamond business is at a moment in time where old ideas and technology are truly meeting head on. We have the GIA and AGS about to grade the cut of a diamond based on measurements and ray tracing computations along with minor parametric grade limiting characteristics. We have several other players grading or ab...
Tabulation of the 15 stones presented as examples of 5 Categories The article concludes with photos and proportion data of 15 stones given as examples of 5 Categories of cut quality. The Categories are presented as the ‘foundation’ of an eventual grading system, but a vague qualification is added; they may not be th...
A review of the “foundation” of GIA’s new cut grade system CLICK HERE TO VIEW POST
Your first day, getting to know the product This morning, you flew into an area in the Arctic, seeing a huge pit from your helicopter. On the ground, enormous trucks pass by carrying tonnes of earth. Your first question to the engineer, guiding you around: how many kilos of diamonds in such a truck? He explains ...
Yesterday's article "U.S. Jewelry Market Becoming More Fragmented" reminded me about The Cluetrain Manifesto where Chris Locke had followed the markets' fragmentations based on automobile industry. At the beginning consumers "can have any color they want as long as it's black." Then "General Motors broke For...
Markets’ Fragmentations is a Natural Proces CLICK HERE TO VIEW POST
I know there is an atmosphere of fear concerning Pricescope apparent in some of the postings on Polygon. Now, this is not universal, as occasionally someone will post that they have decided to participate with Pricescope. Many diamond vendors on Polygon do list their merchandise in many places on the Internet anyway...
Posting to Polygon members about Pricescope 11/11/04 CLICK HERE TO VIEW POST
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