Inclusions in Natural, Synthetic and Treated Ruby
Provides a visual guide to the internal features of natural, synthetic and treated rubies.
Accurate Reporting of Key Trace Elements in Ruby and Sapphire Using Matrix-Matched Standards
Presents a group of corundum standards developed by GIA to improve the accuracy and efficiency of its laser ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) instruments.
Abstracts; Summer 2009
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.
Rubies and Fancy Sapphires from Vietnam
Gem-quality rubies and pink to purple sapphires are being recovered from the Luc Yen and Quy Chau mining regions of Vietnam.
This article reports the results of a series of experiments conducted to explain the phenomenon of induced fingerprints.
Some Diagnostic Features of Russian Hydrothermal Synthetic Rubies and Sapphires
Most Russian hydrothermal synthetic rubies and pink, orange, green, blue and violet sapphires—coloured by chromium and/or nickel—reveal diagnostic zigzag or mosaic-like growth structures associated with colour zoning.
Carbon Dioxide Fluid Inclusions as Proof of Natural-Coloured Corundum
An important clue in identifying natural-coloured corundum is the presence of carbon dioxide fluid inclusions.
Ruby crystals from Southeast Asia with a fixed six-rayed star, similar in effect to trapiche emeralds from Colombia, are described.
Hydrothermal Synthetic Red Beryl from the Institute of Crystallography, Moscow
Hydrothermal synthetic red beryl has been produced for jewellery applications.
Natural Rubies with Glass-Filled Cavities
An examination and analysis of 15 natural rubies with glass-filled cavities.