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“Diffusion Ruby” Proves to be Synthetic Ruby Overgrowth on Natural Corundum

A relatively new production of red corundum, reportedly from Bangkok, has been offered for sale in recent years.

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Introduction to Analysing Internal Growth Structures: Identification of the Negative d Plane in Natural Ruby

This article presents the methods and instruments needed to analyse the internal growth structures of corundum.

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Synthetic Rubies by Douros: A New Challenge for Gemmologists

Greek manufacturer J. & A. Douros introduced a new flux synthetic ruby in early 1993.

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New Rubies from the Morogoro Area, Tanzania
New Rubies from the Morogoro Area, Tanzania

The authors present the mineralogical and gemmological properties of rubies found recently in the Morogoro area of Tanzania that have many features in common with rubies from Myanmar (Burma) and other comparable marble-type deposits.

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The Ramaura Synthetic Ruby

A report on the new synthetic ruby trade-named Ramaura.

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Abstract Header from the 2009 issue of Gems & Gemology
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.

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