sedimentary
Red Jasper
Microcrystalline Quartz (SiO2)
Hardness: 6.5-7 Mohs; Color: Brick red with possible black or brown inclusions; Luster: Vitreous to waxy; Structure: Microcrystalline; Cleavage: None (conchoidal fracture).
- Hardness
- 6
- Color
- Brick red with possible black or brown inclusions
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 Mohs; Color: Brick red with possible black or brown inclusions; Luster: Vitreous to waxy; Structure: Microcrystalline; Cleavage: None (conchoidal fracture).
Formation & geological history
Formation occurs as silica-rich fluids permeate through volcanic or sedimentary rock, with iron oxide impurities providing the red color. Typically found in ancient metamorphic or sedimentary beds.
Uses & applications
Commonly used for decorative ornaments, lapidary cabochons, polished pocket stones, and architectural inlay.
Geological facts
Red Jasper was often referred to as the 'blood of Mother Earth' in ancient cultures and has been used for talismans for thousands of years.
Field identification & locations
Identify by its deep red color, high hardness (will scratch glass), and opaque appearance. Found globally, especially in India, Brazil, and the USA.
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