sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Iron inclusions
Hardness: 6.5-7 (Mohs scale); Color: Opaque brick red to brownish-red; Luster: Vitreous to dull; Crystal structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.91
- Hardness
- 6
- Color
- Opaque brick red to brownish-red
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6.5-7 (Mohs scale); Color: Opaque brick red to brownish-red; Luster: Vitreous to dull; Crystal structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.91
Formation & geological history
Formed through the accumulation of fine-grained silica in sedimentary environments or hydrothermal veins, where iron oxide inclusions provide the characteristic red color.
Uses & applications
Commonly used in jewelry (beads, cabochons), carvings, decorative stones, and as a popular palm stone for collectors.
Geological facts
Jasper has been used as a gemstone since antiquity and was often mentioned in ancient Greek, Roman, and Hebrew literature as a stone of strength and vitality.
Field identification & locations
Identify by its opaque red color and high hardness (it cannot be scratched by a steel knife). Commonly found in river beds, beaches, and desert areas worldwide, especially in India, Brazil, and the USA.
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