How to avoid ‘Conflict Diamonds’
Diamonds should be a blessing to all they touch, from the mine to the consumer, and everyone involved in the chain should be doing their best to insure that this happens. For the most part, they ar...
The intricacies and risks of diamond-cutting
The beginning – assessing the value of rough This February, we were offered a very nice parcel of Botswanan rough. The size of the stones ranged from 2.60 up to 4.60 Carats, 42 stones in...
GIA Excellent Cut Grade: Case Study
Introduction At the start of 2006 GIA began, for the first time ever, issuing cut grades for round colorless diamonds. Evidence suggests this system, that was meant to help, could actually d...
Cutting Ovals
Simple but Ugly Oval Figure 1 shows a 4:3 oval (e.g. 8x6mm) cut using the same indexes (azimuths) as a standard round brilliant and also the same slopes for the main facets (the half-facet slo...
Why do we need diamond grading reports?
Do diamond grading reports add value? With the implementation of new technologies current diamond polishing costs are about $35 per carat. Diamond grading reports run to $127 per carat. Does t...
Black Inclusions in Diamonds
There are two major Gems and Gemology articles relating to inclusions in Gems & Gemology, both primarily concerned with "black" diamonds. G&G Winter 1990: An Investigation of a Suite o...
Scallops
Index Figure 1 shows the typical case where the break facets are equally-spaced around the circle (360°/16 = 22.5° apart). Their slopes are shown for the main slopes and proportions cited. The...
Getting information: In-stock diamonds versus diamonds located with suppliers
Getting Diamond Information When shopping online there are two possibilities for diamonds you find listed in the Pricescope search or in diamond searches on different vendor websites. ...
Getting information: In-stock diamonds versus diamonds located with suppliers VIEW POST
