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CVD- and HPHT-grown synthetic diamonds.
Features of Synthetic Diamonds

Presents a visual guide to the growth processes and major gemological spectroscopic features of synthetic diamonds.

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This 15.32 ct cushion modified brilliant is the largest HPHT synthetic diamond graded by GIA.
15 Carat HPHT Synthetic Diamond

A synthetic diamond seen in the Carlsbad lab is the largest faceted lab-grown diamond examined by GIA.

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Within a parcel of 1,102 diamond melee, 1,092 were identified as HPHT synthetics.
One Natural Melee Diamond Found in Large Batch of HPHT Synthetic Melee

A single natural diamond is found within the largest percentage of undisclosed synthetic melee submitted to GIA.

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Irradiated CVD synthetic diamonds.
Three Irradiated CVD Synthetic Diamonds

Irradiated CVD-grown diamonds are examined in the Carlsbad lab.

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5.01 ct pinkish orange CVD synthetic diamond
Large Pinkish Orange CVD Synthetic Diamond

A combination of size, color, and clarity made this the most remarkable CVD synthetic diamond GIA has tested so far.

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LCM reveals traces of catalyst and step-like growth marks.
Observation of Etched Surface Micro-Features on HPHT Synthetic Diamonds Using Laser Confocal Microscopy

Laser confocal microscopy, a very reliable method of revealing surface micro-features, is used on an HPHT synthetic diamond to reveal growth structures.

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Irradiated 1.06 ct brownish orange HPHT synthetic diamond
Photoluminescence Mapping of Optical Defects in HPHT Synthetic Diamond

Demonstrates the importance of this method in identifying diamond treatments, based on the analysis of PL maps acquired from a brownish orange HPHT synthetic diamond.

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Near-colorless and Fancy Vivid purplish pink CVD synthetic diamonds
Observations on CVD-Grown Synthetic Diamonds: A Review

Explores statistical data and defining characteristics of gem-quality CVD synthetic diamonds examined by GIA since 2003.

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Article
Man-made Diamonds: Questions and Answers

What exactly are man-made diamonds? Find out how they compare to natural diamonds and what you should know.

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Clear, blue and pink synthetic diamond jewelry is displayed around and on pink boxes.
Article
De Beers’ Synthetic Shock Draws Mixed Reactions at 2018 JCK

Retailers had mixed reactions to De Beers’ announcement that it would offer a low-priced line of synthetic diamond jewelry, called Lightbox.

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