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Blue amber beads from the Dominican Republic
Colour Phenomena of Blue Amber

Investigates the presence of fluorescence, rather than iridescence, as the cause of colour in blue amber from the Dominican Republic and Indonesia.

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Four types of heated Baltic amber
Experimental Studies on the Heat Treatment of Baltic Amber

Amber samples were heat-treated, using various procedures and parameters, in an effort to reproduce materials found in the jewellery market.

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A Survey of the Gemstone Resources of China

China has identified many deposits with significant potential to produce gemstones; various species are discussed.

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The Hidden Beauty of Amber: New Light on an Old Subject

The surprising inner world of inorganic inclusions in amber is explored through the use of polarised light and microscopic techniques.

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Abstract Header from the 2009 issue of Gems & Gemology
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.

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Identification of Extraterrestrial Peridot by Trace Elements
Identification of Extraterrestrial Peridot by Trace Elements

Twenty-six peridot samples from the Esquel pallasite meteorite and 27 samples from 10 terrestrial sources were studied by laser ablation.

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Green Amber
Characterisation of “Green Amber” With Infrared and Nuclear Magnetic Resonance Spectroscopy

A peridot-like bright greenish yellow to green gem material called “green amber” has recently appeared in the gem market.

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