sedimentary
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Hardness: 6.5-7 (Mohs scale), Color: Brick red to brownish-red, Luster: Vitreous to dull, Crystal Structure: Trigonal (microcrystalline/cryptocrystalline), Cleavage: None (conchoidal fracture), Specific Gravity: 2.58-2.91
- Hardness
- 6
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Physical properties
Hardness: 6.5-7 (Mohs scale), Color: Brick red to brownish-red, Luster: Vitreous to dull, Crystal Structure: Trigonal (microcrystalline/cryptocrystalline), Cleavage: None (conchoidal fracture), Specific Gravity: 2.58-2.91
Formation & geological history
Formed via the accumulation of silica-rich volcanic ash or the replacement of other materials by silica in sedimentary environments. Its red color is derived from high iron content.
Uses & applications
Commonly used as a gemstone for jewelry (cabochons), ornamental carvings, flooring, and as a healing stone in metaphysical communities.
Geological facts
Red Jasper has been used since antiquity; it was known as the 'mother of all stones' in some cultures and was used to make seals, amulets, and weapon hilts.
Field identification & locations
Identify by its deep red color, opacity (unlike translucent carnelian), and smooth, waxy fracture surface. Found globally, especially in India, Brazil, Russia, and the USA.
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