Lab also rolling out new comments clarifying impact of fluorescence.
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Timepiece will lead Important Watches auction in New York.
Most cushions are modified. This one is brilliant.
Natural diamonds can have weight measurements listed in carats, while lab-grown can appear only in grams.
Heart-shaped stones with $102,000 high price to be among top lots at Magnificent Jewels.
At Gaborone summit, organization formalizes Botswana and Angola as nation affiliated members.
Piece has upper estimate of $242,800 at London sale.
Jewel featuring diamonds likely to fetch up to $350,800.
Fraudsters offering products and financial instruments it says organization endorses.
By uniting heritage, innovation and responsibility, the company is setting a new benchmark for excellence.
Ring carries upper estimate of $550,000 at Exceptional Jewels auction.