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Looking down the crystal axis of a back-lit 58.83 ct trapiche emerald

Article

Emerald: The Superstar of Trapiche Gemstones

Sharon Bohannon, May 17, 2019

Trapiche emeralds, which display a distinct six-spoke wheel pattern, set the standard as some of the finest and most spectacular crystals ever unearthed.

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.

Abstract Header from the 2009 issue of Gems & Gemology

Abstracts; Summer 2009

Brendan M. Laurs, Thomas W. Overton

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

The Ramaura Synthetic Ruby

Robert E. Kane, September 1, 1983

A report on the new synthetic ruby trade-named Ramaura.

Abstracts; Summer 2010

Brendan M. Laurs, Thomas W. Overton

This article, from the Summer 2010 issue of Gems & Gemology, is a compilation of abstracts of important gemmology-related articles published outside Gems & Gemology.

“Diffusion Ruby” Proves to be Synthetic Ruby Overgrowth on Natural Corundum

Christopher P. Smith, June 1, 2002

A relatively new production of red corundum, reportedly from Bangkok, has been offered for sale in recent years.

Introduction to Analysing Internal Growth Structures: Identification of the Negative d Plane in Natural Ruby

Christopher P. Smith, September 1, 1996

This article presents the methods and instruments needed to analyse the internal growth structures of corundum.

Synthetic Rubies by Douros: A New Challenge for Gemmologists

Henry A. Hänni, Karl Schmetzer, June 1, 1994

Greek manufacturer J. & A. Douros introduced a new flux synthetic ruby in early 1993.

Abstracts; Autumn 1991

Dona M. Dirlam

This article, from the Autumn 1991 issue of Gems & Gemology, is a compilation of abstracts of important gemmology-related articles published outside of Gems & Gemology.

New Rubies from the Morogoro Area, Tanzania

H. A. Hänni and K. Schmetzer, September 1, 1991

The authors present the mineralogical and gemmological properties of rubies found recently in the Morogoro area of Tanzania that have many features in common with rubies from Myanmar (Burma) and other comparable marble-type deposits.

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Gemstones

Article Search Results

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Gemstones

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G&G Winter 2019 Edition