This term refers to the characteristics of a material often marketed as “African turquoise.” It’s important to note that this material is not true turquoise, but rather a dyed and treated form of jasper or chalcedony. Genuine turquoise is a hydrated phosphate of copper and aluminum, while the African variety is primarily composed of silicon dioxide. The treatment process typically involves dyeing the stone a vibrant blue-green color to mimic the appearance of higher-value turquoise.
Understanding the nature of this material is crucial for consumers and professionals in the gem and jewelry trade. The appeal of this material lies in its affordability and resemblance to genuine turquoise. However, its altered nature affects its durability, value, and care requirements compared to natural turquoise. Transparency about its composition and treatment is essential to avoid misrepresentation and ensure informed purchasing decisions. Historically, various materials have been used as substitutes or imitations for precious gemstones, highlighting the need for accurate identification and disclosure.
