mineral
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, Cleavage: None, 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, Cleavage: None, Specific Gravity: 2.58-2.91
Formation & geological history
Formed by the infiltration of silica in volcanic ash or fine sediment, often as a result of hydrothermal activity or deep-sea precipitation. The red color is caused by the presence of hematite inclusions.
Uses & applications
Commonly used in jewelry, as gemstones, in decorative carvings, and as a popular specimen for rock tumbling and metaphysical collections.
Geological facts
Red Jasper has been used for centuries and was historically considered the 'rain bringer.' It is a member of the chalcedony family, characterized by its opaque nature and dense structure.
Field identification & locations
Identify by its deep red color, lack of transparency (it is opaque), and hardness—it will easily scratch glass. Commonly found in riverbeds and arid regions worldwide, including the USA, Brazil, and India.
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