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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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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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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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The Identification of Turquoise by Infrared Spectroscopy and X-Ray Powder Diffraction

Two techniques for identifying natural, treated and synthetic turquoise are examined.

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Turquoise from Zhushan County, Hubei Province, China
Turquoise from Zhushan County, Hubei Province, China

A relatively new source of gem-quality turquoise is hosted within slates in Zhushan County of China’s Hubei Province.

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Polymer-Impregnated Turquoise

A large “Persian” turquoise cabochon was impregnated with a material that was also present in cavities on its base.

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A Historic Turquoise Jewellery Set Containing Fossilised Dentine (Odontolite) and Glass

Investigating a set of six antique brooches set with diamonds and light blue cabochons.

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