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Worthy.com offers an online auction platform for selling pre-owned diamond jewelry, loose diamonds, and luxury watches. The company first identifies the market value of the item through an automatic pricing engine and then agrees on a reserve price with the sellers.
A book The Diamond Cutter (Doubleday 2000) by Geshe Michael Roach tells much about trade in loose diamonds, as well as relevant Buddhist teaching. There are diamond cutting houses in Amsterdam that are open to tourists. I expect that it is easy to meet a gem trader there. Thus have I heard. Cuddlyable3 10:39, 16 July 2011 (UTC)
The new lab-grown diamonds retail for about one-tenth the cost of naturally occurring diamonds. The new brand began selling in September 2018 and the stones are produced in Gresham, Oregon, a $94 million facility using the region's cheap electricity, which opened in 2018 with the capacity for 500,000 rough carats of diamonds per year. [58] [59 ...
Some high-end fine jewelers have gotten on board with the trend. In 2023, jeweler Jean Dousset, the great-great-grandson of Louis Cartier, opened a showroom with “designer” lab-grown diamonds ...
An extremely rare pink Argyle diamond ring worth more than $575,000 was stolen from an Australian auction in broad daylight over the weekend. $575,000 is actually just the insurance value.
In the HPHT diamond-growing method that was used by Gemesis, carbon, in graphite form, was placed in a cylindrical "core". A tiny CVD seed diamond was placed at the bottom of the cylinder. The graphite was then subjected to extreme pressure, 850,000 lbf/in² (5.9 GPa) and temperature, 3,000 °F (1,650 °C) for four days.
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related to: sell loose diamondsThe staff understands the journey of their customers - New York Times