Sapphire Beneath the Rich Black Soil of Muling, Northeastern China

JOURNAL ARTICLE published 1 November 2022 in Gems & Gemology

Authors: Yimiao Liu | Ren Lu

The Chanthaburi-Trat Gem Field, Thailand

JOURNAL ARTICLE published 1 January 1982 in Gems & Gemology

Authors: Peter C. Keller

Synthetic Gem Materials and Simulants in the 1990s

JOURNAL ARTICLE published 1 January 2000 in Gems & Gemology

Authors: John I. Koivula | Maha Tannous | Karl Schmetzer

The Jade Enigma

JOURNAL ARTICLE published 1 April 1982 in Gems & Gemology

Authors: Jill M. Hobbs

Jadeite of Guatemala: A Contemporary View

JOURNAL ARTICLE published 1 June 1990 in Gems & Gemology

Authors: David Hargett

Nephrite Jade from Guangxi Province, China

JOURNAL ARTICLE published 1 November 2014 in Gems & Gemology

Authors: Zuowei Yin | Cui Jiang | M. Santosh | Yiming Chen | Yi Bao | Quanli Chen

Latest-Generation CVD-Grown Synthetic Diamonds From Apollo Diamond Inc.

JOURNAL ARTICLE published 1 January 2007 in Gems & Gemology

Authors: Wuyi Wang | Matthew S. Hall | Kyaw Soe Moe | Joshua Tower | Thomas M. Moses

Shadowing: A New Method of Image Enhancement for Gemological Microscopy

JOURNAL ARTICLE published 1 October 1982 in Gems & Gemology

Authors: John I. Koivula

The Natural Formation and Occurrence of Green Quartz

JOURNAL ARTICLE published 1 April 1982 in Gems & Gemology

Authors: Thomas R. Paradise

Vanadium- and Chromium-Bearing Pink Pyrope Garnet: Characterization and Quantitative Colorimetric Analysis

JOURNAL ARTICLE published 1 February 2016 in Gems & Gemology

Authors: Ziyin Sun | Aaron C. Palke | Nathan Renfro

Flux-Grown Synthetic Red and Blue Spinels from Russia

JOURNAL ARTICLE published 1 June 1993 in Gems & Gemology

Authors: Sam Muhlmeister | John I. Koivula | Robert C. Kammerling | Christopher P. Smith | Emmanuel Fritsch | James E. Shigley

Pleochroism and Color Change in Faceted Alexandrite: Influence of Cut and Sample Orientation

JOURNAL ARTICLE published 1 May 2019 in Gems & Gemology

Authors: Karl Schmetzer

Large Colorless HPHT-Grown Synthetic Gem Diamonds from New Diamond Technology, Russia

JOURNAL ARTICLE published 1 November 2015 in Gems & Gemology

Authors: Ulrika F.S. D'Haenans-Johansson | Andrey Katrusha | Kyaw Soe Moe | Paul Johnson | Wuyi Wang

Exploring the Chinese Gem and Jewelry Industry

JOURNAL ARTICLE published 1 May 2014 in Gems & Gemology

Authors: Tao Hsu | Andrew Lucas | Zhili Qiu | Mu Li | Qingyuan Yu

Infrared Spectroscopy in Gem Identification

JOURNAL ARTICLE published 1 April 1987 in Gems & Gemology

Authors: Emmanuel Fritsch | Carol M. Stockton

The Rubies of Burma: A Review of the Mogok Stone Tract

JOURNAL ARTICLE published 1 January 1983 in Gems & Gemology

Authors: Peter C. Keller

Synthetic Gem Materials in the 2000s: A Decade in Review

JOURNAL ARTICLE published 1 December 2010 in Gems & Gemology

Authors: Nathan Renfro | John I. Koivula | Wuyi Wang | Gary Roskin

Fracture Filling of Emeralds: Opticon and Traditional "Oils"

JOURNAL ARTICLE published 1 June 1991 in Gems & Gemology

Authors: Robert C. Kammerling | John I. Koivula | Robert E. Kane | Patricia Maddison | James E. Shigley | Emmanuel Fritsch

Amethyst Mining in Brazil

JOURNAL ARTICLE published 1 January 1988 in Gems & Gemology

Authors: David Stanley Epstein

Geology and Development of the Lomonsov Diamond Deposit, Northwestern Russia

JOURNAL ARTICLE published 1 August 2017 in Gems & Gemology

Authors: Karen V. Smith | Russell Shor