Tag: HPHT-treated

From left: 7-carat sapphire with no heat treatment; 9-carat sapphire with conventional heat treatment; and 7- and 9-carat sapphires with high pressure. high temperature (HPHT) treatment. Photo courtesy GRS Laboratories

Beauty under pressure: Deciphering the cost and payoff for sapphires treated with HPHT

December 23, 2019

Most working in the industry are aware sapphires are routinely treated to increase their marketability. What many dealers, manufacturers, and retailers may not be aware of, however, is a relatively new treatment used to beautify unattractive sapphire: high pressure, high temperature (HPHT).

Fancy that: Expert tips for designing with fancy colour diamonds

August 1, 2015

Today, diamonds are a major part of my repertoire. When I discovered not all diamonds are white, it was the best of all possible worlds—the combination of the positive qualities of diamond with the beauty of colour!

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Others

Tag: HPHT-treated

Under the microscope: Colour instability in CVD diamonds

Beauty under pressure: Deciphering the cost and payoff for sapphires treated with HPHT

Fancy that: Expert tips for designing with fancy colour diamonds

Popular Articles

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Tag: HPHT-treated

Under the microscope: Colour instability in CVD diamonds

Beauty under pressure: Deciphering the cost and payoff for sapphires treated with HPHT

Fancy that: Expert tips for designing with fancy colour diamonds

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