sedimentary
Red Jasper
Silicon Dioxide (SiO2) flavored by Iron Oxide (Hematite)
Hardness: 6.5-7 (Mohs); Color: Deep red to brownish-red; Luster: Vitreous to dull/waxy; Structure: Microcrystalline (Cryptocrystalline); Cleavage: None; Specific Gravity: 2.58-2.91
- Hardness
- 6
- Color
- Deep red to brownish-red
- Luster
- Vitreous to dull/waxy
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Physical properties
Hardness: 6.5-7 (Mohs); Color: Deep red to brownish-red; Luster: Vitreous to dull/waxy; Structure: Microcrystalline (Cryptocrystalline); Cleavage: None; Specific Gravity: 2.58-2.91
Formation & geological history
Formed through the deposition of silica from water-rich environments or hydrothermal fluids, where iron oxide inclusions provide the distinct red coloration. Often found in association with banded iron formations.
Uses & applications
Commonly used for lapidary work, jewelry (cabochons, beads), decorative carvings, and as a spiritual or healing stone in metaphysical communities.
Geological facts
Red Jasper has been used since antiquity; it was known as the 'mother of all stones' in some cultures and was used in the Minoan civilization of Crete to create seals.
Field identification & locations
Identified in the field by its opaque red color, smoothness, and conchoidal fracture. Found worldwide in locations like India, Brazil, Madagascar, and the USA (southwest). It will scratch common glass but cannot be scratched by a steel knife.
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