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Proceedings of The Academy of Natural Sciences (Vol. 137, No. 2, December 1985)
Language: en
Pages: 240

Proceedings of The Academy of Natural Sciences (Vol. 137, No. 2, December 1985)

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Type: BOOK - Published: - Publisher: Academy of Natural Sciences

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Proceedings of The Academy of Natural Sciences (Vol. 138, No. 2, December 30 1986)
Language: en
Pages: 296

Proceedings of The Academy of Natural Sciences (Vol. 138, No. 2, December 30 1986)

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Proceedings of The Academy of Natural Sciences (Vol. 137, No. 1, July 1985)
Language: en
Pages: 212

Proceedings of The Academy of Natural Sciences (Vol. 137, No. 1, July 1985)

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Type: BOOK - Published: - Publisher: Academy of Natural Sciences

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Proceedings of The Academy of Natural Sciences (Vol. 138, No. 1, December 24 1986)
Language: en
Pages: 310

Proceedings of The Academy of Natural Sciences (Vol. 138, No. 1, December 24 1986)

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Ruby & Sapphire
Language: en
Pages: 556

Ruby & Sapphire

Authors: Richard W. Hughes
Categories: Design
Type: BOOK - Published: 1997 - Publisher: R W H Publishing

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The most complete book ever on the corundum gems, ruby & sapphire. Covers all the history, crystallography, physics, chemistry, geology, inclusions, treatments,