sedimentary
Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness: 6.5-7 on the Mohs scale, Color: Red, brown, yellow, green, or multicolored, Luster: Vitreous to dull, Crystal Structure: Trigonal (microcrystalline/cryptocrystalline), Cleavage: None (conchoidal fracture), Specific Gravity: 2.58-2.91
- Hardness
- 6
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Physical properties
Hardness: 6.5-7 on the Mohs scale, Color: Red, brown, yellow, green, or multicolored, Luster: Vitreous to dull, Crystal Structure: Trigonal (microcrystalline/cryptocrystalline), Cleavage: None (conchoidal fracture), Specific Gravity: 2.58-2.91
Formation & geological history
Formed through the precipitation of silica-rich fluids in sedimentary environments or hydrothermal veins, often replacing organic material or filling cavities in volcanic rocks.
Uses & applications
Used for ornamental objects, cabochons, jewelry, carvings, and as a collector's specimen.
Geological facts
Red jasper gets its characteristic crimson color from iron oxide inclusions. It has been used since ancient times for amulets, seals, and weaponry.
Field identification & locations
Easily identified by its opaque nature, conchoidal fracture, and hard, waxy to dull luster. Found worldwide, particularly in regions with ancient volcanic or sedimentary activity.
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