sedimentary
African Turquoise
Teal Jasper (Macro-crystalline Quartz/Sio2 + Inclusions of Copper, Iron, and Manganese)
Hardness: 6.5-7 (Mohs scale); Color: Greenish-blue with dark matrix spots of brown and black; Luster: Vitreous to waxy; Crystal structure: Hexagonal (Micro-crystalline); Cleavage: Uneven/Conchoidal
- Hardness
- 6
- Color
- Greenish-blue with dark matrix spots of brown and black
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 (Mohs scale); Color: Greenish-blue with dark matrix spots of brown and black; Luster: Vitreous to waxy; Crystal structure: Hexagonal (Micro-crystalline); Cleavage: Uneven/Conchoidal
Formation & geological history
Formed in sedimentary environments where silica-rich fluids permeate through rock cavities and absorb various mineral impurities. It is primarily sourced from Africa, specifically and notably from the South African/Zambian region. It is not true turquoise but a type of spotted jasper.
Uses & applications
Primarily used in jewelry making (beads, cabochons, pendants) due to its durability. It is also highly popular in the metaphysical community and for decorative lapidary work.
Geological facts
Despite its name, it is a type of Jasper, not Turquoise. It is much harder and more durable than true turquoise, which allows it to be polished to a higher sheen without stabilization. It is often called the 'Stone of Evolution' in spiritual circles.
Field identification & locations
Identify by its hardness (it should not be scratchable by a copper penny or steel knife easily) and its unique dark, tree-like or splotchy matrix. Found mostly in African mining regions. Collectors look for high contrast between the base teal color and the dark matrix patterns.
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