Provides a visual guide to the internal features of natural, synthetic and treated rubies.
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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.
Read MoreSome manufacturers are known to have treated Verneuil flame-fusion synthetic rubies by immersion in a flux melt to induce patterns like the “fingerprints” seen in some natural rubies.
Read MoreThis article reports the results of a series of experiments conducted to explain the phenomenon of induced fingerprints.
Read MoreMost 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.
Read MoreA new synthetic ruby and synthetic blue sapphire have been synthesised by Johann Lechleitner of Innsbruck, Austria.
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Kyocera Corporation of Kyoto, Japan, is currently marketing under the trade name "Inamori" a macroscopically natural-appearing semitransparent asteriated synthetic ruby.
Read MoreA relatively new production of red corundum, reportedly from Bangkok, has been offered for sale in recent years.
Read MoreHydrothermal synthetic red beryl has been produced for jewellery applications.
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