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Walstromite inclusion with fan-shaped black fractures.
D-Colour Natural IIa Diamond with Walstromite Inclusion

A diamond is proven to have a superdeep origin through an inclusion of CaSiO3-walstromite.

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Summer 1990 Gem News International

A compilation of gem news from around the world, covering topics such as localities, unusual gem materials, market news, new products, discoveries, jewellery manufacturing techniques and industry trends.

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