Jul 25, 2016 · With the traditional diamond growth method, called high-pressure, high-temperature (HPHT), synthetic diamonds are produced from carbon material in apparatuses that mimic the …

Nov 7, 2016 · Summarizes statistical data and distinctive features of several thousand gem-quality HPHT synthetic diamonds examined by GIA from 2007 through 2016.

New Diamond Technology’s colorless HPHT-grown synthetic diamonds are being faceted into gems for the jewelry trade. This study of 44 representative samples revealed that the company …

Aug 9, 2018 · There are two types of high-pressure, high-temperature processes related to diamond: HPHT treatment and HPHT diamond growth. HPHT laboratory-grown diamonds …

HPHT synthetics are making inroads into the large diamond market, with cut stones larger than 10 carats, as well as the colorless melee market, where small HPHT synthetics are being mass …

The gemological and spectroscopic properties of 52 colorless to fancy light-colored HPHT synthetic diamonds (40 of them colorless or near-colorless) produced by AOTC using either …

Nov 8, 2017 · The Carlsbad laboratory recently examined an HPHT synthetic diamond that is now the largest faceted lab-grown diamond examined by GIA. The specimen was a cushion …

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gem-quality synthetic diamonds, where near-color-less specimens are more challenging to produce. Most synthetic diamonds used for jewelry are pro-duced by either high-pressure, …

Dec 2, 2024 · There has since been a sharp decline in submissions of yellow-orange HPHT-grown diamonds, with colorless samples now representing the vast majority of submissions. In …