mineral
Red Jasper
Red Jasper (SiO2 with Hematite inclusions)
Hardness: 6.5-7 (Mohs scale), Color: Brick red to brownish red, Luster: Vitreous to dull, Crystal Structure: Hexagonal (trigonal) microcrystalline, Cleavage: None, Fracture: Conchoidal
- Hardness
- 6
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Physical properties
Hardness: 6.5-7 (Mohs scale), Color: Brick red to brownish red, Luster: Vitreous to dull, Crystal Structure: Hexagonal (trigonal) microcrystalline, Cleavage: None, Fracture: Conchoidal
Formation & geological history
Jasper is an opaque variety of chalcedony formed through the deposition of silica from water. Its red color is derived from iron (hematite) inclusions. It often forms in hydrothermal environments or sedimentary beds over millions of years along volcanic or metamorphic regions.
Uses & applications
Commonly used in jewelry as cabochons, tumbled stones for lapidary collection, decorative figurines, and historically as ornaments and seals.
Geological facts
Red Jasper was known as the 'stone of endurance' in ancient times. It was used by ancient Egyptians in amulets and by Vikings to inlay sword hilts for courage in battle.
Field identification & locations
Identify by its deep red color, opacity (it does not let light through even at the edges), and extreme hardness; it will easily scratch glass. Commonly found in riverbeds, beaches, and desert plains globally, particularly in India, Brazil, and the USA.
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