Article Search Results

Show Filters
Showing 13 results for "*"
Green-blue CVD synthetic diamonds.
Irradiated Green-Blue CVD Synthetic Diamonds

Advancing CVD growth technologies yield intensely coloured, high-quality synthetic diamonds, such as the two green-blue synthetic materials seen in the New York lab.

Read More

5.03 ct Fancy Deep Blue HPHT Synthetic Diamond
Largest Blue HPHT Synthetic Diamond

Analysis of a 5.03 ct HPHT-grown blue synthetic diamond, the largest ever examined by GIA.

Read More

Six HPHT yellow melee diamonds
Analysis of Yellow Diamond Melee for Colour Treatment and Synthetics

A parcel revealed to contain natural, treated and synthetic diamonds reinforces the importance of identification.

Read More

Six near-colorless HPHT synthetic melee diamonds
Near-Colourless Melee-Sized HPHT Synthetic Diamonds Identified in GIA Laboratory

The Bangkok lab examines near-colourless HPHT synthetic diamonds in melee sizes.

Read More

Fancy yellow 0.40 ct type Ib CVD-grown synthetic diamond
Yellow CVD Synthetic Diamond

A Fancy yellow type Ib CVD-grown synthetic diamond undergoes testing at the New York lab.

Read More

0.34 ct CVD synthetic
CVD Synthetic Diamond with Unusual Inclusions

Examination of a CVD synthetic diamond with an unusual pattern of growth dislocations that resemble natural inclusions.

Read More

CVD film on 0.27 ct diamond
Long-Term Durability of CVD Synthetic Film on Natural Diamond

A natural diamond with a CVD synthetic film is examined at GIA's Carlsbad lab.

Read More

HPHT-grown synthetic diamond
Mixed-Type HPHT Synthetic Diamond with Unusual Growth Features

Although this stone bore some superficial resemblance to moissanite, its gemmological properties were consistent with HPHT synthetic diamond.

Read More

Fancy Black Nano-polycrystalline Diamond
A Larger, Higher-Quality NPD Synthetic Diamond

GIA’s New York laboratory recently detected an undisclosed NPD synthetic diamond, a 1.51 ct Fancy Black round.

Read More

Type IaB natural diamond
Natural Colourless Type IaB Diamond with Silicon-Vacancy Defect Centre

Examination revealed a rare instance of a silicon-vacancy defect in natural diamond.

Read More