Gems & Gemology’s 7 Most Unusual Encounters from 2019
Check out some of the most interesting and unusual diamonds and coloured stones submitted to GIA’s laboratories in 2019.
Inclusions in Natural, Synthetic and Treated Ruby
Provides a visual guide to the internal features of natural, synthetic and treated rubies.
Unusual Composite Ruby Rough
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
This synthetic ruby specimen features two growth methods within the same crystal.
Assemblage of Synthetic Ruby in Calcite Matrix
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
An unusual synthetic ruby, combining a hydrothermal ruby seed and flux ruby overgrowth, is examined at the Carlsbad lab.
Hydrothermal Synthetic Red Beryl from the Institute of Crystallography, Moscow
Hydrothermal synthetic red beryl has been produced for jewellery applications.
Separating Natural and Synthetic Rubies on the Basis of Trace-Element Chemistry
Natural and synthetic gem rubies can be separated on the basis of their trace-element chemistry.
Synthetic Rubies by Douros: A New Challenge for Gemmologists
Greek manufacturer J. & A. Douros introduced a new flux synthetic ruby in early 1993.
Abstracts; Summer 1991
From the Summer 1991 issue of Gems & Gemmology, a summary of important gemmology-related articles published in other journals.