An Early Byzantine Engraved Almandine from the Garibpet Deposit, Telangana State, India: Evidence for Garnet Trade Along the Ancient Maritime Silk Road
Analyses the chemical composition and inclusion characteristics of this ancient artefact.
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.
New Chromium- and Vanadium-Bearing Garnets from Tranoroa, Madagascar
Pyrope-spessartine garnets from Tranoroa, in southern Madagascar, contain appreciable Cr and somewhat lower V contents.
Bohemian Garnet – Today
Red garnets have been mined in the Bohemian Hills of Czechoslovakia since the 16th century.
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.
Determining Garnet Composition from Magnetic Susceptibility and Other Properties
Quantitative measurements of magnetic susceptibility combined with RI or SG data can provide an easy and inexpensive way of inferring garnet composition.
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 Proposed New Classification for Gem-Quality Garnets
Eight garnet species are defined and methods of identification are described.