sedimentary
Red Jasper
Silicon Dioxide (SiO2) with hematite inclusions
Hardness: 6.5-7 (Mohs); Color: deep brick red; Luster: dull to vitreous; Structure: Microcrystalline/cryptocrystalline; Cleavage: none (conchoidal fracture); Specific gravity: 2.58-2.91
- Hardness
- 6
- Color
- deep brick red
- Luster
- dull to vitreous
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Physical properties
Hardness: 6.5-7 (Mohs); Color: deep brick red; Luster: dull to vitreous; Structure: Microcrystalline/cryptocrystalline; Cleavage: none (conchoidal fracture); Specific gravity: 2.58-2.91
Formation & geological history
Formed from the deposition of silica-rich hydrothermal fluids or volcanic ash in sedimentary environments; the red color comes from iron (hematite) inclusions.
Uses & applications
Used primarily in jewelry (cabochons, beads), decorative carvings, and as a healing stone in holistic practices. Historically used for tools and ornaments.
Geological facts
Red jasper was highly prized in ancient times; Egypt used it for amulets and carvings. It is known as a stone of endurance and 'grounding' in metaphysical circles.
Field identification & locations
Identified by its opaque red color, smoothness when wet, and inability to be scratched by a steel knife. Common along riverbeds and beaches globally.
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