sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
Hardness: 6.5-7 on Mohs scale; Color: Dull red to deep reddish-brown; Luster: Vitreous to waxy; Crystal Structure: Microcrystalline/Cryptocrystalline (Trigonal); Cleavage: None, exhibits conchoidal fracture.
- Hardness
- 6
- Color
- Dull red to deep reddish-brown
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 on Mohs scale; Color: Dull red to deep reddish-brown; Luster: Vitreous to waxy; Crystal Structure: Microcrystalline/Cryptocrystalline (Trigonal); Cleavage: None, exhibits conchoidal fracture.
Formation & geological history
Formed when fine-grained quartz crystals precipitate along with hematite or other iron oxides in volcanic or sedimentary environments, often during hydrothermal activity.
Uses & applications
Used primarily as decorative gemstone material, lapidary carvings, tumbled stones, jewelry beads, and metaphysical crystal work.
Geological facts
Red jasper has been used for millennia, serving as sacred stones and amulets in ancient Egypt, Rome, and Native American cultures due to its rich blood-red hue.
Field identification & locations
Identified by its rich red color, high hardness (scratches glass), smooth waxy feel when tumbled, and lack of transparency. Common worldwide, especially in South Africa, Brazil, India, and the USA.
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