sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
Hardness: 6.5-7 (Mohs scale); Color: Deep opaque red; Luster: Vitreous to waxy; Crystal structure: Hexagonal (Trigonal, microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.91
- Hardness
- 6
- Color
- Deep opaque red
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 (Mohs scale); Color: Deep opaque red; Luster: Vitreous to waxy; Crystal structure: Hexagonal (Trigonal, microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.91
Formation & geological history
Formed when microcrystalline quartz precipitates from silica-rich fluids in hydrothermal veins or sedimentary environments. Its red color is derived from high iron (hematite) content.
Uses & applications
Commonly used for lapidary work, jewelry (beads and cabochons), decorative carvings, and as a popular stone for collectors and metaphysical practices.
Geological facts
Red Jasper was known as the 'mother of all stones' in ancient cultures and was frequently used for amulets and seals in ancient Egypt and Mesopotamia.
Field identification & locations
Identified by its opaque appearance and brick-red color. It will scratch glass but cannot be scratched by a steel knife. Commonly found in riverbeds or near volcanic regions.
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