sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
Hardness: 6.5-7 on Mohs scale; Color: Brick red to brownish-red; Luster: Dull to vitreous; Crystal Structure: Microcrystalline/Trigonal; Cleavage: None; 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 on Mohs scale; Color: Brick red to brownish-red; Luster: Dull to vitreous; Crystal Structure: Microcrystalline/Trigonal; Cleavage: None; Specific Gravity: 2.58-2.91
Formation & geological history
Formed through the accumulation of silica-rich microfossils or volcanic ash that undergoes lithification, with the signature red color coming from high iron (hematite) content.
Uses & applications
Used primarily in lapidary work for cabochons, beads, and architectural ornaments. Also highly valued in spiritual and metaphysical collecting.
Geological facts
Red Jasper has been used for thousands of years as a stone of protection and endurance; it was often used in ancient amulets by Egyptians and Native Americans.
Field identification & locations
Identify by its waxy-to-dull luster, conchoidal fracture, and extreme hardness (cannot be scratched by a steel knife). Commonly found in riverbeds or coastal areas where silica minerals concentrate.
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