sedimentary
Red Jasper (Polished)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
Hardness: 6.5-7 on Mohs scale; Color: Brick red with dark streaks; Luster: Vitreous to waxy (when polished); Structure: Microcrystalline; Cleavage: None; Specific Gravity: 2.58-2.91
- Hardness
- 6
- Color
- Brick red with dark streaks
- Luster
- Vitreous to waxy (when polished)
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Physical properties
Hardness: 6.5-7 on Mohs scale; Color: Brick red with dark streaks; Luster: Vitreous to waxy (when polished); Structure: Microcrystalline; Cleavage: None; Specific Gravity: 2.58-2.91
Formation & geological history
Formed through the deposition of silica-rich fluids in volcanic or sedimentary environments, where iron inclusions provide the red color. Typically found in Precambrian or Paleozoic formations.
Uses & applications
Primarily used for decorative purposes, lapidary arts, jewelry (cabochons and beads), and as a popular specimen for rock tumbling and metaphysical collections.
Geological facts
The name 'Jasper' originates from the Greek word 'iaspis', meaning 'spotted stone.' Historically, red jasper was known as the 'warrior's stone' and was used in ancient Egypt and by Native Americans for protection and strength.
Field identification & locations
Identify by its opaque nature (unlike agate which is translucent), its deep red color, and its inability to be scratched by a steel knife. Common locations include Brazil, India, Australia, and the western United States.
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