sedimentary
Red Jasper
Silicon dioxide (SiO2) with iron oxide inclusions
Hardness: 6.5-7 on Mohs scale; Color: Brick red to deep red; Luster: Vitreous to dull; Crystal Structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.91.
- Hardness
- 6
- Color
- Brick red to deep red
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6.5-7 on Mohs scale; Color: Brick red to deep red; Luster: Vitreous to dull; Crystal Structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.91.
Formation & geological history
Formed from the deposition of silica in groundwater or hydrothermal fluids, with its red color derived from hematite (iron) inclusions. Usually found in sedimentary or volcanic environments.
Uses & applications
Commonly used in jewelry as beads or cabochons, for lapidary work, decorative carvings, and as a healing stone in metaphysical communities.
Geological facts
Jasper has been used as a gemstone since antiquity; it was known in ancient Greek, Roman, and Persian cultures as a stone for protection and vitality.
Field identification & locations
Identify by its opaque red color, smoothness after being water-worn, and hardness (it will scratch glass). Commonly found on gravel beaches and in dry creek beds.
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