sedimentary
Red Jasper
Red Jasper (SiO2 with Fe2O3 impurities)
Hardness: 6.5-7 Mohs; Color: Opaque Brick-Red; Luster: Vitreous to Waxy (polished); Crystal Structure: Hexagonal (Microcrystalline); Cleavage: None/Conchoidal Fracture; Specific Gravity: 2.58-2.91
- Hardness
- 6
- Color
- Opaque Brick-Red
- Luster
- Vitreous to Waxy (polished)
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Physical properties
Hardness: 6.5-7 Mohs; Color: Opaque Brick-Red; Luster: Vitreous to Waxy (polished); Crystal Structure: Hexagonal (Microcrystalline); Cleavage: None/Conchoidal Fracture; Specific Gravity: 2.58-2.91
Formation & geological history
Formed primarily as a sedimentary rock when microcrystalline silica becomes saturated with iron oxide (hematite) during the lithification process. It can occur in hydrothermal veins and volcanic environments where silica-rich fluids permeate porous rocks.
Uses & applications
Used extensively in jewelry for cabochons and beads, ornamental sculptures, metaphysical healing practices, and as a decorative stone in mosaics and home decor.
Geological facts
Red Jasper has been used since ancient times for protection and stamina. In Greek mythology, it was associated with the blood of Mother Earth. It is a member of the Chalcedony mineral family and is distinguished from Carnelian by its opacity.
Field identification & locations
Identified in the field by its deep red color, opacity (cannot see through it even at thin edges), and hardness (it will scratch glass). Commonly found in the US Southwest, South Africa, and Brazil.
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