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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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A Gemological Study of Turquoise in China

Chinese gem-quality turquoise is sky blue, greenish blue or bluish green in colour.

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The Identification of Zachery-Treated Turquoise | Gems & Gemmology

Millions of carats of turquoise have been enhanced by a proprietary process called the Zachery treatment.

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