Article Search Results

A face-up view of a cushion cut diamond with blue color.

Article

Gems & Gemology’s 7 Most Unusual Encounters from 2019

Stuart Overlin, Brooke Goedert and Kellie Giordano, December 13, 2019

Check out some of the most interesting and unusual diamonds and coloured stones submitted to GIA’s laboratories in 2019.

A large group of people outside on GIA’s Carlsbad, California campus.

Article

Guardians of Trust: GIA’s Innovative Research, Instruments and Services

Russell Shor, September 20, 2019

GIA’s services and instruments have grown in importance and impact as new gem treatments and laboratory-grown gems have entered the market.

Inclusions in Natural, Synthetic and Treated Ruby

Nathan D. Renfro, John I. Koivula, Jonathan Muyal, Shane F. McClure, Kevin Schumacher, and James E. Shigley, January 26, 2018

Provides a visual guide to the internal features of natural, synthetic and treated rubies.

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.

Synthetic Ruby Overgrowth on Natural Corundum

Article

Analysis of Synthetic Ruby Overgrowth on Corundum

Sudarat Saeseaw, Vincent Pardieu, Vararut Weeramonkhonlert, Supharat Sangsawong and Jonathan Muyal, June 25, 2015

Analysis of synthetic ruby overgrowth on corundum, using analysis of inclusions, UV-Vis-NIR and EDXRF spectroscopy, and LA-ICP-MS.

Unusual Composite Ruby Rough

Meenakshi Chauhan, January 30, 2015

In this composite, synthetic ruby rough attached to two natural ruby slabs was fashioned to imitate natural material.

Flame-Fusion Synthetic Ruby Boule with Flux Synthetic Ruby Overgrowth

Ziyin Sun and Heidi Breitzmann, October 31, 2014

This synthetic ruby specimen features two growth methods within the same crystal.

Article

Insights From Inclusions

GIA, September 29, 2014

Natural gemstones are typically far more valuable than synthetic ones, so being able to identify them correctly is a powerful skill.

Assemblage of Synthetic Ruby in Calcite Matrix

Nazar Ahmed and Sutas Singbamroong, July 25, 2014

Material set in a calcite matrix and represented as natural ruby is proven to be synthetic.

Flux-Grown Synthetic Ruby with Hydrothermal Synthetic Seed Crystal

Ziyin Sun and Dino DeGhionno, July 25, 2014

An unusual synthetic ruby, combining a hydrothermal ruby seed and flux ruby overgrowth, is examined at the Carlsbad lab.

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Article Search Results

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