sedimentary
Picture Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Hardness: 6.5-7 (Mohs scale); Color: Tan, brown, beige, and cream with landscape-like patterns; Luster: Vitreous to waxy; Structure: Microcrystalline; Cleavage: None/Conchoidal fracture.
- Hardness
- 6
- Color
- Tan, brown, beige, and cream with landscape-like patterns
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 (Mohs scale); Color: Tan, brown, beige, and cream with landscape-like patterns; Luster: Vitreous to waxy; Structure: Microcrystalline; Cleavage: None/Conchoidal fracture.
Formation & geological history
Formed as a chemical sedimentary rock through the precipitation of silica from water in cavities or fissures, where iron oxides or other minerals create tiered patterns during the hardening process.
Uses & applications
Primarily used in jewelry, lapidary arts, metaphysical practices, and as collector specimens due to its unique artistic patterns.
Geological facts
The name comes from the Greek word 'iaspis', meaning spotted stone. It is often referred to as 'Earth Jasper' because the patterns frequently resemble miniature desert or mountain landscapes.
Field identification & locations
Can be identified by its opaque nature, high hardness, and distinctive desert-like banding. It is commonly found in riverbeds or mountain regions of the Pacific Northwest, specifically Oregon, USA.
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