sedimentary
Red Jasper
Jasper (Microcrystalline Quartz, SiO2)
Hardness: 6.5-7 (Mohs scale); Color: Red (due to iron oxides/hematite); Luster: Dull to Vitreous; Crystal Structure: Trigonal (Microcrystalline); Fracture: Conchoidal; Opaque appearance.
- Hardness
- 6
- Color
- Red (due to iron oxides/hematite)
- Luster
- Dull to Vitreous
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Physical properties
Hardness: 6.5-7 (Mohs scale); Color: Red (due to iron oxides/hematite); Luster: Dull to Vitreous; Crystal Structure: Trigonal (Microcrystalline); Fracture: Conchoidal; Opaque appearance.
Formation & geological history
Formed through the deposition of silica from hydrothermal solutions or volcanic ash in sedimentary environments, often involving secondary mineralization. It can be found in various geological ages depending on the deposit location.
Uses & applications
Primarily used as a gemstone in jewelry, decorative carvings, lapidary art, and as a collector's specimen. In industry, it can be used for grinding and polishing materials.
Geological facts
Red Jasper has been used by various cultures for thousands of years, known as a stone of strength and protection. It is a variety of chalcedony that contains up to 20 percent foreign materials which determine its color and opacity.
Field identification & locations
Identify in the field by its deep red color, opacity (cannot see through it even at edges), and high hardness—it will easily scratch glass. Commonly found in river beds, beaches, or areas with volcanic history.
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