Fracture-Filled Diamond

My thoughts on diamonds today brought my memory back to a time several years ago when a gem dealer brought in a 2.46 carats, round brilliant-cut diamond for grading.

Before we proceeded with the grading(quality analysis) of the stone, we conducted a few gemological tests to determine if the stone was diamond.

However, upon examination of the inclusions in the stone through the microscope under dark-field illumination, the color flashes in at least two of the 'feathers' (orangy-brown in one and purplish-red in the other) revealed that the diamond was a fracture-filled diamond.

We had to inform our client that we could not proceed to grade the said diamond as it was fracture-filled and it was our laboratory's policy not to grade fracture-filled diamonds.

Instead we issued a gem-identification(gem-testing) report stating that the stone was a diamond with a comment that it was fracture-filled.

In view of the fact that many diamonds out in the market may be fracture-filled(and unfortunately often not being disclosed as such by the supplier), gem dealers, jewelers as well as consumers are advised to have their diamonds checked by a gemologist before doing a purchase.

For more info on fracture-filled diamonds go to : http://en.wikipedia.org/wiki/Diamond_enhancement


©️ 2021 John Ng, G.G.

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