Article Search Results

Man sits at his desk with a display stand of multiple pieces of jewelry in front of him.

Article

Alum’s Lifelong Quest: Searching for Jewellery Unicorns

August 14, 2019

Alan Nacht continues his family’s legacy - Bernard Nacht & Co. – and his quest for unforgettable jewellery.

On the left is a 5.26 ct Fancy deep blue heart shape HPHT synthetic diamond. On the right is a 5.27 ct Fancy deep blue emerald cut HPHT synthetic diamonds.

Article

The Latest on Synthetic Diamonds

GIA, September 8, 2017

Dr James Shigley, GIA distinguished research fellow, is one of the foremost experts in diamonds and their identification. In this presentation recorded at the 2017 JCK Las Vegas show, he shares the latest developments about HPHT and CVD synthetic diamond

Article

Pyrope Garnet and Montana Sapphires Highlight Winter 2015 G&G

Russell Shor, February 1, 2016

G&G Brief presents an overview of the content of the Winter 2015 issue of Gems & Gemology.

10 Study Samples Before and After HPHT Processing

GE POL Diamonds: Before and After

Christopher P. Smith, George Bosshart, September 1, 2000

This article explores and identifies the changes that type IIa GE POL diamonds experience before and after HPHT annealing.

De Beers near Colourless-to-Blue Experimental Gem-Quality Synthetic Diamonds

Marie-Line T. Rooney, C. M. Welbourn, March 1, 1993

De Beers has produced a faceted synthetic gem-quality diamond that could go unrecognised without careful gemmological testing.

Gemmological Properties of Near-Colourless Synthetic Diamonds

James E. Shigley, Thomas M. Moses, March 1, 1997

Examination of 51 colourless to near-colourless synthetic diamonds from all known sources of production confirms that they can be distinguished from similar-appearing natural diamonds on the basis of their gemmological properties.

Long-Term Durability of CVD Synthetic Film on Natural Diamond

Sally Eaton-Magaña, July 25, 2014

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

Discovery and Mining of the Argyle Diamond Deposit, Australia

James E. Shigley, John Chapman, March 1, 2001

Australia’s Argyle mine has set records for volume since its establishment in 1983, and is additionally noted for its rare pink diamonds.

Synthetic Moissanite: A New Diamond Substitute

Kurt Nassau, Shane F. McClure, December 1, 1997

Synthetic moissanite is much closer to diamond in overall appearance and heft than any previous diamond imitation; this article reports on how to identify and characterise it.

Abstract Header from the 2009 issue of Gems & Gemology

Abstracts; Winter 2009

Brendan M. Laurs, Thomas W. Overton

This article, from the Winter 2009 issue of Gems & Gemmology, is a compilation of abstracts of important gemmology-related articles published outside of Gems & Gemmology.

Article Search Results

Types

Content Type

Reviewed

Topics

Topics

Gemstones

Article Search Results

Types

Content Type

Reviewed

Topics

Topics

Gemstones

Find a Retailer

Visit the campus shop

Subscribe to Knowledge Rocks Emails

G&G Spring 2021 Edition