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Characterisation of Peridot from Sardinia, Italy

Ilaria Adamo, Rosangela Bocchio, Alessandro Pavese, and Loredana Prosperi

Gem-quality peridot is occasionally found as mantle xenoliths within basalts near Pozzomaggiore.

A Survey of the Gemstone Resources of China

Peter C. Keller and Wang Fuquan, March 1, 1986

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

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GIA Tests Extraterrestrial Gemstones for Down-to-Earth Elements

Russell Shor, Senior Industry Analyst

While scientists speculate about diamond planets hurtling through the galaxy, at least one extraterrestrial gemstone is already among us.