Article Search Results

Confusing, Triangular Inclusions in an Art Deco-Style Pin

Spring 1991 G&G Lab Notes

March 1, 1991

This section, from the Spring 1991 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.

Fancy Black NPD Synthetic Diamond

Paul Johnson and Kyaw Soe Moe, April 30, 2014

Testing reveals the first synthetic nano-polycrystalline diamond (NPD) to be detected by a gem lab.

Article

Spring 2015 G&G Examines Blue Spinel, Chinese Jewellery Design and the Latest in Synthetics

Russell Shor, June 12, 2015

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

Article

Summer 2015 G&G: Dual-Stars, Photomicrography Guide, Rubies from Tajikistan, New Micro-World Section

Russell Shor, August 14, 2015

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

A row of five low-quality bead cultured pearls.

Article

A Study on Improving the Surface Appearance of Low-Quality Pinctada maxima Bead Cultured Pearls

Nanthaporn Nilpetploy, Kwanreun Lawanwong, Promlikit Kessrapong, Areeya Manustrong and Nicholas Sturman, March 24, 2021

In this study, the Bangkok laboratory examined five low-quality bead cultured pearls sourced directly from a local pearl factory and characterised their features before and after processing.

A white and purple pearl sitting in half of its shell.

Article

Clam Chowder with a Side of Pearl

Phoebe Shang, January 15, 2021

Recently, GIA’s laboratory in New York had the opportunity to examine a fascinating pearl find and hear about an even more fascinating story.

Assembled “Pearl” Filled with Wire

Nanthaporn Somsa-ard and Areeya Manustrong, April 30, 2014

Microradiography reveals wire fillings within a “pearl” created from two separate specimens.

Abstract Header from the 2009 issue of Gems & Gemology

Abstracts; Autumn 2009

Brendan M. Laurs, Thomas W. Overton

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

An oval shaped bicolor tanzanite has purple on each side with blue-green in the middle.

Article

December Blues: Birthstone Gifts that Will Delight

Sharon Bohannon, December 7, 2018

Looking for a gift for someone special? December’s birthstones offer a treat for every taste, style and personality – even if it’s not their birth month.

Combine emeralds and gold with the sophisticated design of Cartier and voilà − earrings of timeless beauty. Courtesy of a private collector. Photo by Tino Hammid/Copyright GIA and Tino Hammid

Article

Leaf Motifs: Timeless Beauty for All Seasons of Jewellery

Sharon Bohannon, June 17, 2016

The humble leaf has captivated jewellery designers for centuries and they’ve transformed it into enduring pieces of beautiful jewellery.

Article Search Results

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Reviewed

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Gemstones

Article Search Results

Types

Content Type

Reviewed

Topics

Gemstones

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G&G Spring 2021 Edition