mineral
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide impurities
Hardness: 6.5-7 (Mohs scale); Color: Brick red to brownish-red; Luster: Dull to vitreous; Crystal Structure: Hexagonal (Microcrystalline); Cleavage: None; Fracture: Conchoidal; Specific Gravity: 2.58-2.91
- Hardness
- 6
- Color
- Brick red to brownish-red
- Luster
- Dull to vitreous
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Physical properties
Hardness: 6.5-7 (Mohs scale); Color: Brick red to brownish-red; Luster: Dull to vitreous; Crystal Structure: Hexagonal (Microcrystalline); Cleavage: None; Fracture: Conchoidal; Specific Gravity: 2.58-2.91
Formation & geological history
Formed through the infiltration of silica-rich hydrothermal fluids into volcanic rock or sedimentary beds where iron oxides provide the deep red pigment. It is a variety of microcrystalline quartz.
Uses & applications
Commonly used as a gemstone for jewelry, carvings, ornaments, and decorative items. In many cultures, it is used as a healing stone.
Geological facts
Red Jasper has been used for centuries and was favored in ancient Egypt for amulets. It is often referred to as the 'Stone of Endurance' due to its toughness.
Field identification & locations
Identified by its distinctive opaque red color, dull luster when raw, and inability to be scratched by a steel knife. Frequently found in stream beds or as rounded pebbles on beaches.
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