sedimentary
Jasper
Microcrystalline Quartz (SiO2)
Hardness of 6.5 to 7 on the Mohs scale, varies in color including red, brown, yellow, and green due to iron oxide impurities, has a waxy to vitreous luster, and exhibits a conchoidal fracture with no true cleavage.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, varies in color including red, brown, yellow, and green due to iron oxide impurities, has a waxy to vitreous luster, and exhibits a conchoidal fracture with no true cleavage.
Formation & geological history
Formed through the precipitation of silica-rich fluids in sedimentary environments or hydrothermal veins, often occurring in ancient marine deposits over millions of years.
Uses & applications
Commonly used for making decorative objects, cabochons, jewelry, carvings, and as a collector's mineral specimen.
Geological facts
Jasper has been used by ancient civilizations for thousands of years to create tools, seals, and ornamental jewelry. Its distinctive patterns and rich earth tones make each piece unique.
Field identification & locations
Can be identified in the field by its hardness (scratches glass), lack of cleavage, and opaque, colorful appearance. Found worldwide in riverbeds, mountainous regions, and ancient sedimentary formations.
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