
sedimentary
Red Jasper
Silicon Dioxide (SiO2)
Hardness: 6.5-7 (Mohs scale), Color: Red to brownish-red due to iron inclusions, Luster: Vitreous to dull, 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: Red to brownish-red due to iron inclusions, Luster: Vitreous to dull, Crystal Structure: Trigonal (microcrystalline quartz), Cleavage: None/Conchoidal fracture, Specific Gravity: 2.58-2.91
Formation & geological history
Formed via the deposition of silica from hydrothermal solutions or in sedimentary environments where iron oxides are present during the silicification process. Commonly associated with banded iron formations.
Uses & applications
Primarily used as a gemstone for jewelry, including cabochons and beads, as well as for ornamental carvings, desktop items, and metaphysical healing collections.
Geological facts
The red color is caused by impurities of Iron(III) oxide (Hematite). Historical cultures used Red Jasper for ritual amulets and to symbolize 'the blood of the Earth.'
Field identification & locations
Identify in the field by its opacity (it is not translucent like carnelian), its high hardness (it cannot be scratched by a steel knife), and its characteristic smooth, waxy feel when polished naturally by water. Found globally in areas with ancient volcanic or sedimentary activity.
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