gemstone
African Turquoise
Jasper (Silica mineral, quartz variety)
AI-generated identification · may be incorrectMohs hardness of 6.5 to 7. Colors range from greenish-blue to turquoise with dark black or brown matrix spotting. Vitreous to dull luster with a microcrystalline structure.
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Physical properties
Mohs hardness of 6.5 to 7. Colors range from greenish-blue to turquoise with dark black or brown matrix spotting. Vitreous to dull luster with a microcrystalline structure.
Formation & geological history
Formed through the hydrothermal alteration of basalt and other volcanic rocks, primarily found in arid African regions.
Uses & applications
Extensively used in beaded jewelry, cabochons, and ornamental carvings due to its striking resemblance to genuine turquoise.
Geological facts
Despite its trade name, African turquoise is actually a hard, highly fractured jasper rather than true phosphate-based turquoise.
Field identification & locations
Identified by its matrix web and hardness that easily scratches glass. Commonly sourced from deposits in South Africa.
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