mineral
Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness: 6.5-7 on the Mohs scale. Color: predominantly red, orange, brown, with dark green or black inclusions. Luster: vitreous to waxy. Crystal structure: trigonal (microcrystalline).
- Hardness
- 6
- Luster
- vitreous to waxy
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Physical properties
Hardness: 6.5-7 on the Mohs scale. Color: predominantly red, orange, brown, with dark green or black inclusions. Luster: vitreous to waxy. Crystal structure: trigonal (microcrystalline).
Formation & geological history
Forms from silica-rich fluids in sedimentary or volcanic environments, often with iron inclusions that give it its red/orange color.
Uses & applications
Commonly used for lapidary work, tumbling, carving, and ornamental jewelry.
Geological facts
Jasper is an opaque, impure variety of silica. The red color is typically due to iron inclusions.
Field identification & locations
Identified by its opacity, hardness, and conchoidal fracture. Often found as river rocks or in sedimentary deposits.
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