Diamonds

Yesterday we received a diamond from our International Selection that had an inscription that I had never seen in real life before.

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It is a common belief amongst the diamond buying public that diamonds are unbreakable. After all, they rate 10 on the Moh’s scale, so they must be tough, right?

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Over the past 18 months, we have been stocking a good number of diamonds with fluorescence. In days gone by, high colour diamonds with strong fluorescence were marketed as “blue-white” diamonds and commanded a premium. In modern times however, fluorescence has been typically frowned upon by the trade and therefore consumers. However, is this about to change?

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Just before Christmas, we sent nine diamonds to the GIA for grading. As per usual, the results are below.

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Last week, we sent two GIA certified stones to the AGS lab. The reason being was that the GIA both gave them a “very good” cut grade, despite them being what we thought top stones deserving of a higher cut grade.

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One of the things I’ve always wondered was how popular certain shapes of diamonds really are. So, I decided to gather statistics from our diamond search and see how many searches were performed on each shape.

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A few weeks ago, we sent seven stones to the GIA in Carlsbad for certification. Six had our own “Jogia Grading System” certificates and one had a DCLA certificate.

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In May, we wrote about the square hearts and arrows cut that we are now stocking. Since then, we’ve showed it to numerous people (funnily enough, mostly in the trade) who have all been amazed at the brilliance and sparkle of the Square Hearts and Arrows cut. (more…)

Correct me if I’m wrong, but no Australian diamond grading lab lists either the star length or lower half length on their certificates - something that both the GIA and AGS do on round brilliants.

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Despite being incredibly hard, diamonds are brittle, and every so often, a setter (or a jeweller) chips one. Sometimes it’s no problem, like when the stone is only small, and can be replaced with another from the parcel of hundreds of melee. Other times it’s a total headache…

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