mineral
Red Jasper
Microcrystalline Quartz (SiO2 with Fe2O3 inclusions)
AI-generated identification · may be incorrectHardness: 6.5-7 on the Mohs scale; Color: deep opaque brick-red to brownish-red; Luster: vitreous to waxy when polished; Crystal structure: trigonal/microcrystalline (cryptocrystalline aggregate); Cleavage: none (conchoidal fracture); Specific gravity: ~2.58-2.65.
- Hardness
- 6
- Color
- deep opaque brick-red to brownish-red
- Luster
- vitreous to waxy when polished
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Physical properties
Hardness: 6.5-7 on the Mohs scale; Color: deep opaque brick-red to brownish-red; Luster: vitreous to waxy when polished; Crystal structure: trigonal/microcrystalline (cryptocrystalline aggregate); Cleavage: none (conchoidal fracture); Specific gravity: ~2.58-2.65.
Formation & geological history
Formed through the deposition of silica-rich fluids within volcanic rocks, hydrothermal veins, or sedimentary beds, enriched with iron oxide (hematite) impurities which produce its rich red color.
Uses & applications
Commonly used in lapidary arts for decorative carvings, cabochons, polished freeforms, tumbled stones, jewelry beads, and metaphysical crystal healing collections.
Geological facts
Red jasper has been used since antiquity; ancient Egyptians associated it with the blood of Isis and carved it into protective amulets. It is exceptionally tough and takes a high-gloss polish.
Field identification & locations
Identified in the field by its distinct opaque red color, conchoidal fracture, smooth waxy surface, and hardness sufficient to scratch glass. Widely found in India, Madagascar, South Africa, Australia, Brazil, and the western United States.
