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The Elahera Gem Field in Central Sri Lanka

Mahinda Gunawardene and Mahinda S. Rupasinghe, June 1, 1986

The Elahera gem field currently provides approximately 35% of the gemstones exported from Sri Lanka.

'Cobalt-Blue' Gem Spinels

James E. Shigley and Carol M. Stockton, March 1, 1984

Similarities between natural spinels - with intense blue colour - and synthetic material, have led to difficulties in the recognition of the natural stones by traditional methods.

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