sedimentary
Red Jasper
Microcrystalline Quartz (SiO2) with Hematite inclusions
Hardness: 6.5-7 on Mohs scale; Color: Reddish-brown to earthy red; Luster: Dull to waxy when raw; Crystal structure: Trigonal/Microcrystalline; Cleavage: None; Specific gravity: 2.58-2.91
- Hardness
- 6
- Color
- Reddish-brown to earthy red
- Luster
- Dull to waxy when raw
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Physical properties
Hardness: 6.5-7 on Mohs scale; Color: Reddish-brown to earthy red; Luster: Dull to waxy when raw; Crystal structure: Trigonal/Microcrystalline; Cleavage: None; Specific gravity: 2.58-2.91
Formation & geological history
Formed via the deposition of silica from hydrothermal solutions or volcanic ash in sedimentary environments, where iron oxides (hematite) provide the red pigment. Often found as rounded pebbles in riverbeds or beaches.
Uses & applications
Commonly used for lapidary work, jewelry (beads and cabochons), ornamental carvings, and as a popular stone for tumble polishing and chakra balancing.
Geological facts
Red Jasper has been used for millennia; it was known as a stone of endurance and was often used in ancient amulets and by warriors for protection. It is a variety of chalcedony.
Field identification & locations
Identify by its characteristic brick-red color, extreme hardness (it will scratch glass), and smooth, water-worn exterior if found in rivers. It displays a conchoidal fracture when broken.
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