sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
Hardness: 6.5-7 (Mohs); Color: Brick red to brownish-red; Luster: Dull to vitreous; Crystal structure: Hexagonal (trigonal) microcrystalline quartz; Specific gravity: 2.58-2.91
- Hardness
- 6
- Color
- Brick red to brownish-red
- Luster
- Dull to vitreous
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Physical properties
Hardness: 6.5-7 (Mohs); Color: Brick red to brownish-red; Luster: Dull to vitreous; Crystal structure: Hexagonal (trigonal) microcrystalline quartz; Specific gravity: 2.58-2.91
Formation & geological history
Formed from silica-rich fluids that permeate volcanic or sedimentary rocks, often enriched with iron during secondary mineralization and found in regions with ancient tectonic activity.
Uses & applications
Primarily used for lapidary work, jewelry (beads, cabochons), ornamental sculpture, and for metaphysical collections as a grounding stone.
Geological facts
Red jasper was a favorite gem in antiquity; it is mentioned in the Bible and was known as a 'warrior's stone' by Egyptians and Native Americans for its supposed strength-giving properties.
Field identification & locations
Look for a deep red color and opaque translucency; typically does not scratch with a pocketknife. Commonly found in riverbeds or gravel pits in regions like South Africa, Brazil, and the USA.
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