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 Cause of Iridescence in Rainbow Andradite from Nara, Japan
“Rainbow” andradite from Nara, Japan, occurs as relatively small orangey brown crystals that show attractive iridescence in almost the entire range of the spectrum.
Pyrope garnets occur in near-colourless to light orange and pink, as well as the familiar red.
Gem-Quality Grossular Garnets
The gemmological classification and identification of gem grossular garnets is examined.
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.
Gem Andradite Garnets
Gem-quality andradites are easy to distinguish chemically from other types of gem garnets.