sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
Hardness: 6.5-7 (Mohs), Color: Brick red to brownish-red, Luster: Dull to vitreous, Crystal structure: Hexagonal (microcrystalline), Specific gravity: 2.58-2.91
- Hardness
- 6
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Physical properties
Hardness: 6.5-7 (Mohs), Color: Brick red to brownish-red, Luster: Dull to vitreous, Crystal structure: Hexagonal (microcrystalline), Specific gravity: 2.58-2.91
Formation & geological history
Formed from the deposition of silica from water-rich environments, often in hydrothermal veins or as a secondary mineral in volcanic rocks. Its red color is derived from hematite (iron) inclusions.
Uses & applications
Commonly used for lapidary work, jewelry (cabs/beads), decorative ornaments, and as a popular specimen for rock tumbling and holistic healing collections.
Geological facts
Red Jasper has been used since antiquity; it was mentioned in the Bible and used by ancient Minoans and Egyptians for seals and amulets. It is considered a stone of endurance.
Field identification & locations
Identify by its deep red color, conchoidal fracture, and inability to be scratched by a steel knife. It is frequently found in riverbeds, glacial tills, and desert pavements worldwide.
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