sedimentary
Red Jasper
Microcrystalline Quartz (SiO2) with Hematite impurities
Hardness: 6.5-7 (Mohs scale), Color: Dull red to brownish-red, Luster: Vitreous to dull, Crystal Structure: Trigonal (microcrystalline), 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: Dull red to brownish-red, Luster: Vitreous to dull, Crystal Structure: Trigonal (microcrystalline), Cleavage: None (conchoidal fracture), Specific Gravity: 2.58-2.91
Formation & geological history
Formed when silica-rich fluids permeate through volcanic ash or sedimentary beds, with the red color derived from iron (hematite) inclusions. Found in varied geological ages from Precambrian to recent.
Uses & applications
Metaphysical/decorative collecting, jewelry (cabochons), lapidary work, and historical use for seals and amulets.
Geological facts
Red jasper was highly prized in the ancient world, mentioned in multiple historical texts and often used for protective amulets by Ancient Egyptians. It is known as a stone of endurance and stability.
Field identification & locations
Identified by its deep red color, extreme hardness (can scratch glass), and opaque density. Commonly found in river beds or areas with ancient volcanic activity like the American Southwest, India, and Brazil.
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