sedimentary
Red Jasper
Quartz (SiO2) with hematite inclusions
Hardness: 6.5-7 (Mohs scale); Color: Brick red to brownish-red; Luster: Dull to vitreous; Crystal Structure: Hexagonal (microcrystalline); Cleavage: None; Opaque.
- Hardness
- 6
- Color
- Brick red to brownish-red
- Luster
- Dull to vitreous
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Physical properties
Hardness: 6.5-7 (Mohs scale); Color: Brick red to brownish-red; Luster: Dull to vitreous; Crystal Structure: Hexagonal (microcrystalline); Cleavage: None; Opaque.
Formation & geological history
Formed primarily through the infiltration of silica in sedimentary rocks or volcanic ash, with iron oxides (hematite) providing the red color during the stone's formation over millions of years.
Uses & applications
Used extensively in lapidary work for cabochons, beads, and carvings, as well as decorative stones and metaphysical collectibles.
Geological facts
Red Jasper is known as a stone of endurance and was used in ancient times for talismans; it is essentially a chert variety colored by iron.
Field identification & locations
Identify by its deep red color, lack of transparency, and smooth conchoidal fracture. Often found in gravel beds or as nodules in volcanic rock regions.
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