sedimentary
Red Jasper (possibly with Agate inclusions)
Silicon Dioxide (SiO2)
Hardness: 6.5-7 (Mohs scale), Color: Deep red/maroon with white/grey patches, Luster: Waxy to vitreous, Crystal Structure: Microcrystalline/Cryptocrystalline, Cleavage: None/Conchoidal fracture, Specific Gravity: 2.58-2.91
- Hardness
- 6
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Physical properties
Hardness: 6.5-7 (Mohs scale), Color: Deep red/maroon with white/grey patches, Luster: Waxy to vitreous, Crystal Structure: Microcrystalline/Cryptocrystalline, Cleavage: None/Conchoidal fracture, Specific Gravity: 2.58-2.91
Formation & geological history
Formed through the accumulation of volcanic ash or silica-rich sediments in high-iron environments. Often found in hydrothermal veins or as stream-tumbled pebbles.
Uses & applications
Used widely for lapidary work, decorative cabochons, jewelry, stone carvings, and as a popular rock-tumbling specimen for collectors.
Geological facts
Red Jasper gets its distinct color from high iron oxide content. It was a popular gemstone in the ancient world, frequently used in Babylonian and Egyptian jewelry.
Field identification & locations
Identify by its opacity (jasper is opaque) and red color that does not scratch easily with a steel knife. Commonly found in riverbeds and gravel pits in areas with volcanic history.
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