sedimentary
Red Jasper
Silicon Dioxide (SiO2)
Hardness: 6.5-7 Mohs; Color: Brick red to brownish red; Luster: Vitreous to dull; Crystal Structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.91
- Hardness
- 6
- Color
- Brick red to brownish red
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6.5-7 Mohs; 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 via the deposition of silica from hydrothermal solutions or volcanic ash, with high iron oxide content providing the red pigment. Often found in sedimentary beds or volcanic flows.
Uses & applications
Used extensively in jewelry, lapidary arts, ornamental carvings, and as a healing stone in metaphysical practices.
Geological facts
Red Jasper has been used since antiquity; it was known as the 'rain-bringer' in some ancient cultures and was mentioned in the Bible as a part of the High Priest's breastplate.
Field identification & locations
Identify by its deep red color, opaque transparency, and smooth conchoidal fracture. Commonly found in South Africa, Brazil, India, and the USA.
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