sedimentary
Red Jasper with Quartz
Microcrystalline Quartz (SiO2) with Hematite inclusions
Hardness: 6.5-7 (Mohs scale), Color: Brick red with gray/white quartz patches, Luster: Vitreous to dull, Structure: Cryptocrystalline, Cleavage: None (conchoidal fracture)
- Hardness
- 6
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Physical properties
Hardness: 6.5-7 (Mohs scale), Color: Brick red with gray/white quartz patches, Luster: Vitreous to dull, Structure: Cryptocrystalline, Cleavage: None (conchoidal fracture)
Formation & geological history
Formed via the deposition of silica-rich fluids in volcanic ash or sedimentary rock cavities, with iron oxide (hematite) providing the red pigmentation.
Uses & applications
Used primarily as a gemstone for jewelry, lapidary arts like tumbling and cabochon cutting, and in metaphysical collections.
Geological facts
Red Jasper has been used since antiquity; it was known in ancient Egypt and mentioned in biblical texts as a stone of protection and strength.
Field identification & locations
Identify by its deep red color, high hardness (cannot be scratched by a steel knife), and smooth, glass-like fracture surfaces. Often found in riverbeds and gravel deposits.
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