sedimentary
Picture Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Hardness: 6.5-7 (Mohs), Color: Tan, brown, or cream with darker streaks, Luster: Vitreous to waxy, Crystal structure: Hexagonal (microcrystalline), Cleavage: None, Specific gravity: 2.58-2.91
- Hardness
- 6
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Physical properties
Hardness: 6.5-7 (Mohs), Color: Tan, brown, or cream with darker streaks, Luster: Vitreous to waxy, Crystal structure: Hexagonal (microcrystalline), Cleavage: None, Specific gravity: 2.58-2.91
Formation & geological history
Formed from petrified or silicated mud and volcanic ash flows that hardened over millions of years. Its unique banding is created by mineral-rich water flowing through the porous ground.
Uses & applications
Used primarily in jewelry (cabochons), ornamental pieces, home decor, and as a popular lapidary material for hobbyists.
Geological facts
Often called the 'Stone of Global Awareness,' it is unique because the patterns often resemble landscapes, mountains, or desert scenes.
Field identification & locations
Identify by its smooth, opaque, earthy colors and its extreme hardness (will scratch glass). Commonly found in the Pacific Northwest of the USA, particularly Oregon.
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