sedimentary
Red Jasper
Jasper (Silicon Dioxide, SiO2)
Hardness: 6.5-7 (Mohs scale); Color: Red, brown, yellow; Luster: Vitreous to dull; Crystal Structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.91
- Hardness
- 6
- Color
- Red, brown, yellow
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6.5-7 (Mohs scale); Color: Red, brown, yellow; Luster: Vitreous to dull; Crystal Structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.91
Formation & geological history
Formed via the deposition of silica from water-bearing solution and often found in sedimentary rocks or as part of volcanic flows. The red color is typically due to iron inclusions.
Uses & applications
Used primarily for lapidary work, jewelry, ornamental carvings, and as a popular specimen for collectors.
Geological facts
Red Jasper is known as a stone of endurance; ancient Egyptians often wore it as amulets to provide protection and increase strength.
Field identification & locations
Identified by its opaque appearance, waxy luster when wet or polished, and unique red mottling. Commonly found in riverbeds and gravel pits globally.
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