Pyrope Garnet and Montana Sapphires Highlight Winter 2015 G&G
G&G Brief presents an overview of the content of the Winter 2015 issue of Gems & Gemology.
Demantoid from Val Malenco, Italy: Review and Update
New data are presented for demantoid from Val Malenco, Italy, as obtained by classical gemological methods.
First Discovery of Topazolite in Mexico
Reports on the first discovery of fine topazolite garnet crystals in Mexico.
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.
A Proposed New Classification for Gem-Quality Garnets
Eight garnet species are defined and methods of identification are described.
Pyrope-Spessartine Garnets with Unusual Color Behavior
Unusual color-change garnets.
Gem Andradite Garnets
Gem-quality andradites are easy to distinguish chemically from other types of gem garnets.
Two Notable Color-Change Garnets
The gemological properties and chemical compositions of two unusual color-change garnets are reviewed.
Gem Garnets in The Red-To-Violet Color Range
This article shows that the characteristic of color appears to have little correlation with variations in bulk (not trace) composition or physical properties.