Where is Jasper found?
Chalcedony (microcrystalline Quartz) with iron oxide inclusions
Got a photo? Identify rocks instantly with the Rockby app
Open the appJasper 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 Jasper
United States
Significant deposits in Oregon (Picture Jasper), California, Idaho, Arizona, and Washington.
India
Known for various types of Jasper, including red and green varieties.
Madagascar
Famous for Ocean Jasper and other orbicular jaspers.
Australia
Produces Mookaite Jasper and other colorful varieties.
Russia
Ural Mountains are a historical source of high-quality Jasper.
Collecting tips
- Look in Volcanic and Sedimentary Terrains. Jasper is commonly found in areas with past volcanic activity or in sedimentary rock formations where silica-rich fluids have been present. Check stream beds, gravel pits, and exposed rock outcrops.
- Identify Opaque, Fine-Grained Material. Jasper is opaque and has a very fine-grained texture. Look for rocks that are not translucent and do not show visible crystal structures.
- Observe Color and Pattern. The wide range of colors and distinctive patterns (bands, spots, orbicular structures) are key indicators. Iron oxide inclusions often give it red, brown, or yellow hues.
- Test Hardness. Jasper has a Mohs hardness of 6.5-7, meaning it will scratch glass and steel. This helps differentiate it from softer minerals.
- Examine Fracture. Jasper exhibits a conchoidal (shell-like) to splintery fracture, similar to flint or chert, due to its cryptocrystalline nature.
Quick Check
- Color:
- Highly variable (red, brown, yellow, green, blue, black, multicolored)
- Luster:
- Dull to waxy, sub-vitreous when polished
- Streak:
- White (despite varied body color, due to the dominant quartz component)
Explore Jasper
Identify rocks anywhere
Free on iOS, Android, and Web. Photo identification, full database, and your personal collection.