sedimentary
Red Jasper (Beaded Necklace)
Silicon dioxide (SiO2) with iron oxide inclusions
Hardness: 6.5-7 (Mohs scale); Color: Opaque brick red to terracotta; Luster: Vitreous to dull; Crystal structure: Microcrystalline (trigonal); Grainy texture with occasional inclusions.
- Hardness
- 6
- Color
- Opaque brick red to terracotta
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6.5-7 (Mohs scale); Color: Opaque brick red to terracotta; Luster: Vitreous to dull; Crystal structure: Microcrystalline (trigonal); Grainy texture with occasional inclusions.
Formation & geological history
Formed through the infiltration of silica-rich fluids into sediment or volcanic ash, typically during the diagenesis process. The red color is caused by high concentrations of iron oxide (hematite).
Uses & applications
Primarily used as a gemstone for jewelry (beads, cabochons), ornamental carvings, and in alternative healing practices as a grounding stone.
Geological facts
Jasper is a variety of chalcedony. It has been used since ancient times for cylinder seals and amulets. The name is derived from the Greek word 'iaspis', meaning spotted stone.
Field identification & locations
Identify by its opaque nature (never translucent), deep red color, and high hardness (cannot be scratched by a steel knife). Commonly found in riverbeds or near volcanic deposits globally.
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