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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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GIA Tests Extraterrestrial Gemstones for Down-to-Earth Elements

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

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Peridot from Sardinia, Italy
Characterisation of Peridot from Sardinia, Italy

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

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