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.
Gem Garnets in The Red-To-Violet Colour Range
This article shows that the characteristic of colour appears to have little correlation with variations in bulk (not trace) composition or physical properties.
A New Classification for Red-To-Violet Garnets
An overview of previous red-to-violet garnet classification schemes and a proposal for a new one.
A Proposed New Classification for Gem-Quality Garnets
Eight garnet species are defined and methods of identification are described.
Gem Andradite Garnets
Gem-quality andradites are easy to distinguish chemically from other types of gem garnets.
Demantoid from Val Malenco, Italy: Review and Update
New data are presented for demantoid from Val Malenco, Italy, as obtained by classical gemmological methods.