Article Search Results

Synthetic Forsterite and Synthetic Peridot

Kurt Nassau, June 1, 1994

Large crystals of chromium-containing synthetic forsterite are being commercially manufactured for use as a laser material.

Russian Synthetic Ametrine

Vladimir S. Balitsky, Taijin Lu, June 1, 1999

Gem-quality synthetic ametrine has been produced commercially in Russia since 1994.

CVD Synthetic Diamonds from Gemesis Corp

Wuyi Wang, Ulrika F. S. D’Haenens-Johansson, Paul Johnson, Kyaw Soe Moe, Erica Emerson, Mark E. Newton, and Thomas M. Moses, June 1, 2012

An examination of the gemmological and spectroscopic properties of CVD synthetic diamonds from Gemesis Corp.

Update on Mexifire synthetic fire opal

Rajneesh Bhandari and Gagan Choudhary

As a result of changes in the manufacturing process, recent production of the synthetic fire opal marketed as “Mexifire” exhibits some new properties.

Inamori Synthetic Cat's-Eye Alexandrite

Robert E. Kane, September 1, 1987

This article reports on a detailed gemmological examination of this new synthetic cat's-eye alexandrite.

Flux-Grown Synthetic Red and Blue Spinels from Russia

Sam Muhlmeister, John I. Koivula, June 1, 1993

Examination of red and blue samples of a relatively new flux synthetic spinel from Russia established criteria by which they can be separated from their natural counterparts.

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.

The Growth of Brazil-Twinned Synthetic Quartz and the Potential for Synthetic Amethyst Twinned on the Brazil Law

John I. Koivula and Emmanuel Fritsch, September 1, 1989

Colourless synthetic quartz that shows obvious Brazil-law twinning has been grown over a seed plate of natural amethyst.

A Preliminary Study on the Separation of Natural and Synthetic Emeralds Using Vibrational Spectroscopy

Le Thi-Thu Huong, Wolfgang Hofmeister, Tobias Häger, Stefanos Karampelas, and Nguyen Duc-Trung Kien, January 30, 2015

Reports preliminary findings—based on FTIR and Raman spectrometry of more than 300 samples—on distinguishing natural and synthetic emeralds using vibrational spectroscopy.

The Gemmological Properties of the De Beers Gem-Quality Synthetic Diamonds

James E. Shigley, Emmanuel Fritsch, December 1, 1987

Examination of a group of 14 brownish yellow, yellow and greenish yellow synthetic diamonds reveals distinctive gemmological properties.

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