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.
Pyrope-Spessartine Garnets with Unusual Colour Behaviour
Unusual colour-change garnets.
Two Notable Colour-Change Garnets
The gemmological properties and chemical compositions of two unusual colour-change garnets are reviewed.
The Andradites of San Benito County, California
Mines in San Benito County, California, produce andradite in various colours; some are chatoyant.
A Proposed New Classification for Gem-Quality Garnets
Eight garnet species are defined and methods of identification are described.