sedimentary
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Hardness: 6.5-7 (Mohs scale); Color: Brick red to brownish red with cream/white bands; Luster: Vitreous/Waxy; Crystal Structure: Microcrystalline Trigonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.58-2.91
- Hardness
- 6
- Color
- Brick red to brownish red with cream/white bands
- Luster
- Vitreous/Waxy
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Physical properties
Hardness: 6.5-7 (Mohs scale); Color: Brick red to brownish red with cream/white bands; Luster: Vitreous/Waxy; Crystal Structure: Microcrystalline Trigonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.58-2.91
Formation & geological history
Formed through the deposition of silica from water or through the replacement of organic material and other minerals. The red color is derived from iron (hematite) inclusions within the cryptocrystalline quartz structure.
Uses & applications
Commonly used for tumbled stones, decorative ornaments, gemstone jewelry (cabochons and beads), and as a metaphysical healing stone.
Geological facts
Jasper has been a favorite gemstone throughout history; it was used in ancient Egypt for amulets and in medieval Europe for protection. It is often called the 'Supreme Nurturer'.
Field identification & locations
Identify by its rich red color, high hardness (cannot be scratched by a steel blade), and smooth, waxy surface when polished. Frequently found in riverbeds and desert environments in areas like India, Brazil, and the Southwestern USA.
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