sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
Hardness: 6.5-7 (Mohs), Color: Deep brick red to brownish-red, Luster: Vitreous to dull, Crystal Structure: Microcrystalline (trigonal), Cleavage: None, Specific Gravity: 2.6-2.9
- Hardness
- 6
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Physical properties
Hardness: 6.5-7 (Mohs), Color: Deep brick red to brownish-red, Luster: Vitreous to dull, Crystal Structure: Microcrystalline (trigonal), Cleavage: None, Specific Gravity: 2.6-2.9
Formation & geological history
Formed when fine-grained silica-rich materials or volcanic ash were subjected to heat and pressure, often within sedimentary or igneous environments. Inclusions of hematite provide the red pigmentation.
Uses & applications
Used extensively for lapidary work, jewelry (cabochons and beads), ornamental carvings, and as a popular protective stone in metaphysical communities.
Geological facts
Red Jasper is known as a stone of endurance and nurturing. It has been used since antiquity for seals, amulets, and architectural decoration across Egyptian, Babylonian, and Native American cultures.
Field identification & locations
Identify by its opaque red color and high hardness (cannot be scratched by a steel knife). Commonly found in riverbeds or coastal areas as water-rounded pebbles. Major sources include India, Brazil, and the USA.
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