mineralological specimen
Red Jasper
Silicon Dioxide (SiO2) with Iron inclusions
Hardness: 6.5-7 (Mohs), Color: Brick red to brownish red, Luster: Vitreous to dull, Crystal structure: Hexagonal (cryptocrystalline), Cleavage: None (conchoidal fracture), SG: 2.58-2.91
- Hardness
- 6
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Physical properties
Hardness: 6.5-7 (Mohs), Color: Brick red to brownish red, Luster: Vitreous to dull, Crystal structure: Hexagonal (cryptocrystalline), Cleavage: None (conchoidal fracture), SG: 2.58-2.91
Formation & geological history
Formed when fine particulate materials (usually silica) are deposited in soft sediments or volcanic ash, which then undergoes silicification. The red color is caused by the presence of iron oxide (hematite) inclusions.
Uses & applications
Commonly used for lapidary work, jewelry (cabochons, beads), decorative ornaments, and as a popular stone for tumble polishing and metaphysical collections.
Geological facts
Red Jasper was known as the 'stone of endurance' in ancient times and has been used by various cultures for amulets and seals dating back to Mesopotamia and ancient Egypt.
Field identification & locations
Identify by its deep red color, opacity (light will not pass through it even at the edges), and extreme hardness—it will easily scratch glass but cannot be scratched by a steel knife. Frequently found in riverbeds and mountainous regions.
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Red Jasper
Quartz (Silicon Dioxide) with Iron Oxide impurities (Fe2O3)
mineralological specimen
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
mineralological
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
mineralological variety
N/A
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Not a geological specimen
N/A (man-made object)
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Indeterminate