sedimentary
Red Jasper (possibly Orbicular Jasper)
Silicon Dioxide with inclusions (SiO2)
Hardness: 6.5-7 (Mohs scale), Color: Red with dark grey/green mottling, Luster: Dull to waxy, Crystal Structure: Microcrystalline/Cryptocrystalline, Specific Gravity: 2.58-2.91
- Hardness
- 6
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Physical properties
Hardness: 6.5-7 (Mohs scale), Color: Red with dark grey/green mottling, Luster: Dull to waxy, Crystal Structure: Microcrystalline/Cryptocrystalline, Specific Gravity: 2.58-2.91
Formation & geological history
Jasper is an opaque variety of chalcedony formed through the deposition of silica into cracks and cavities within rocks. Its red color comes from iron (hematite) inclusions. Many specimens like this were water-worn in riverbeds or glacial deposits.
Uses & applications
Commonly used for lapidary work including cabochons, beads, carvings, and tumbled stones. Also popular as a decorative landscaping stone or for metaphysical collection.
Geological facts
Jasper has been used as a gemstone for thousands of years, appearing in the pectorals of high priests in ancient history and recorded in various mythological texts as a stone of strength.
Field identification & locations
Identify by its hardness (cannot be scratched by a steel knife), opaque nature, and smooth, water-worn exterior. Commonly found in riverbeds and along coastal beaches in regions with volcanic or sedimentary history.
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