sedimentary
Red Jasper
Silicate (SiO2 with Hematite inclusions)
Hardness: 6.5-7 (Mohs scale), Color: Brick red to brownish red, Luster: Dull to vitreous, Crystal structure: Trigonal (microcrystalline/cryptocrystalline), Fracture: Conchoidal
- Hardness
- 6
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Physical properties
Hardness: 6.5-7 (Mohs scale), Color: Brick red to brownish red, Luster: Dull to vitreous, Crystal structure: Trigonal (microcrystalline/cryptocrystalline), Fracture: Conchoidal
Formation & geological history
Formed when fine silica-rich material is deposited in sediments or volcanic ash, with iron inclusions providing the red color. Often found in hydrothermal veins or as nodules.
Uses & applications
Commonly used for lapidary work, jewelry (beads and cabochons), ornate carvings, and as a popular stone for tumbling and collecting.
Geological facts
Red Jasper has been used since antiquity; it was known as the 'rain bringer' in some cultures and was frequently used in cylinder seals and jewelry in Mesopotamia and Ancient Egypt.
Field identification & locations
Identify in the field by its opaque red color, High hardness (it will scratch glass), and lack of cleavage. It is commonly found globally, notably in India, Brazil, and the USA.
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