sedimentary or metamorphic
Jasper or Red Quartzite
SiO2 (Silicon Dioxide with iron oxide impurities)
Hardness of 7 on the Mohs scale, opaque red/brownish-red color, dull to waxy luster, conchoidal fracture if massive.
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Physical properties
Hardness of 7 on the Mohs scale, opaque red/brownish-red color, dull to waxy luster, conchoidal fracture if massive.
Formation & geological history
Formed from silica-rich fluids precipitating in sedimentary environments or through the metamorphism of sandstone. The red color is typically due to iron inclusions.
Uses & applications
Often used for lapidary arts, tumbling, and decorative purposes.
Geological facts
Red jasper has been used since ancient times for engraving and ornamentation.
Field identification & locations
Identified by its hardness (scratches glass), opaque nature, and red color. Commonly found in riverbeds or beaches as water-worn pebbles.
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