sedimentary
Red Jasper
Red Jasper (SiO2 with Fe2O3 inclusions)
Hardness: 6.5-7 (Mohs scale), Color: Brick red to brownish-red, Luster: Vitreous to dull (waxy when polished), Crystal Structure: Trigonal (microcrystalline quartz), 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 (waxy when polished), Crystal Structure: Trigonal (microcrystalline quartz), Cleavage: None (conchoidal fracture), Specific Gravity: 2.58-2.91
Formation & geological history
Formed mainly through the deposition of silica from hydrothermal solutions or volcanic ash in sedimentary environments; its red color comes from high iron inclusions (hematite).
Uses & applications
Widely used for lapidary arts, jewelry (cabochons and beads), ornamental carvings, and as a popular stone for crystal healing and mineral collectors.
Geological facts
Red Jasper was known as the 'warrior's stone' in ancient times and has been found in archaeological sites dating back to the Bronze Age. The name jasper comes from the Greek word 'iaspis', meaning spotted stone.
Field identification & locations
Identified in the field by its opaque nature, reddish hue, and extreme hardness (it will scratch glass). Commonly found in riverbeds, deserts, and volcanic regions globally, including the USA, Brazil, and India.
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