sedimentary
Red Jasper with Quartz
Silicon Dioxide (SiO2) with Hematite inclusions
Hardness: 6.5-7 on Mohs scale. Color: Opaque red with white/milky quartz sections. Luster: Vitreous to waxy. Crystal Structure: Trigonal (microcrystalline/cryptocrystalline). Cleavage: None (conchoidal fracture). Specific Gravity: 2.58-2.91.
- Hardness
- 6
- Color
- Opaque red with white/milky quartz sections
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 on Mohs scale. Color: Opaque red with white/milky quartz sections. Luster: Vitreous to waxy. Crystal Structure: Trigonal (microcrystalline/cryptocrystalline). Cleavage: None (conchoidal fracture). Specific Gravity: 2.58-2.91.
Formation & geological history
Formed through the deposition of silica from hydrothermal solutions or within volcanic and sedimentary rocks. Red Jasper specifically gets its color from iron oxide (hematite) inclusions during the consolidation of silica-rich sediments.
Uses & applications
Commonly used in jewelry (beads, cabochons, pendants), lapidary art (carvings like this heart), and as ornamental stones. It is also a popular stone in metaphysical and collecting circles.
Geological facts
Jasper is a variety of chalcedony. The name 'Jasper' is derived from the Greek word 'iaspis', meaning 'spotted stone'. It was highly prized in the ancient world for its supposed protective qualities.
Field identification & locations
Identify by its opacity (unlike translucent carnelian), hardness (it will scratch glass), and characteristically smooth, waxy feel when polished. Widely available worldwide with major deposits in India, South Africa, Brazil, and the USA.
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