The Identification of Zachery-Treated Turquoise | Gems & Gemmology
Millions of carats of turquoise have been enhanced by a proprietary process called the Zachery treatment.
A Gemological Study of Turquoise in China
Chinese gem-quality turquoise is sky blue, greenish blue or bluish green in colour.
A Survey of the Gemstone Resources of China
China has identified many deposits with significant potential to produce gemstones; various species are discussed.
The Identification of Turquoise by Infrared Spectroscopy and X-Ray Powder Diffraction
Two techniques for identifying natural, treated and synthetic turquoise are examined.
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.
A large “Persian” turquoise cabochon was impregnated with a material that was also present in cavities on its base.
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.