Where is Picture Jasper found?
Chalcedony (microcrystalline quartz) with iron oxides and other minerals
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Open the appPicture Jasper occurs in specific geological environments. Knowing where to look, and in what kind of rock, is the difference between going home empty-handed and finding a great specimen.
Where to find Picture Jasper
Oregon, USA
Known for its high-quality Picture Jasper, particularly from the Owyhee Mountains, which often features intricate landscape-like patterns.
Idaho, USA
Various localities produce Picture Jasper, often with distinct color palettes and patterns.
Australia
Several regions yield Picture Jasper, sometimes with unique red and brown hues.
Africa (e.g., Madagascar, South Africa)
Sources of various types of jasper, including those with scenic patterns.
Collecting tips
- Look for Sedimentary and Volcanic Environments. Picture Jasper is often found in areas with past volcanic activity or in sedimentary beds where silica-rich fluids have been active. Look for outcrops of chert, agate, or other chalcedony varieties.
- Examine Riverbeds and Alluvial Deposits. Water erosion can transport and concentrate jasper nodules and fragments in riverbeds, gravel bars, and alluvial fans. Look for rounded, dense stones with earthy colors.
- Identify Characteristic Patterns. The most distinguishing feature is the 'picture' or 'landscape' patterns. Look for contrasting colors and layered or dendritic formations within the stone.
- Check for Hardness. Jasper is relatively hard (Mohs 6.5-7). It will scratch glass and will not be easily scratched by a steel knife.
Quick Check
- Color:
- Earthy browns, tans, reds, blacks in scenic patterns.
- Luster:
- Dull to waxy.
- Streak:
- White.
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