sedimentary
Red Jasper with Quartz Vein
Microcrystalline Quartz (SiO2) with Hematite inclusions
Hardness: 6.5-7 Mohs; Color: Brick red with white veins; Luster: Dull to waxy; Structure: Cryptocrystalline; Cleavage: None; Opaque.
- Hardness
- 6
- Color
- Brick red with white veins
- Luster
- Dull to waxy
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Physical properties
Hardness: 6.5-7 Mohs; Color: Brick red with white veins; Luster: Dull to waxy; Structure: Cryptocrystalline; Cleavage: None; Opaque.
Formation & geological history
Formed when silica-rich fluids permeate through volcanic or sedimentary rock layers, often associated with iron oxide (hematite) giving it the red color. The white vein represents a secondary fracture that was later filled by pure quartz.
Uses & applications
Commonly used as a decorative stone, lapidary material for cabochons, and as a pocket stone or tumbled specimen.
Geological facts
Red Jasper has been used since ancient times for talismans; it is known as a 'Wishing Stone' in some cultures due to the quartz band cutting through it.
Field identification & locations
Identified by its opaque red color and hardness (it cannot be scratched by a steel knife). Common in river beds and shorelines where it has been naturally tumbled and smoothed.
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