sedimentary
Jasper
Microcrystalline Quartz (SiO2)
Hardness of 6.5-7 on the Mohs scale, waxy luster, opaque, and features dendritic or banded patterns with various earth tones like brown, yellow, and grey.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, waxy luster, opaque, and features dendritic or banded patterns with various earth tones like brown, yellow, and grey.
Formation & geological history
Formed from silica-rich solutions precipitating in sedimentary environments or hydrothermal veins, often accumulating in ocean basins or volcanic ash beds over millions of years.
Uses & applications
Commonly used for ornamental carvings, polished cabochons, jewelry, and lapidary art.
Geological facts
Jasper has been used since antiquity for ancient seals, talismans, and weaponry, and is mentioned in various historical texts spanning thousands of years.
Field identification & locations
Easily identified by its opaque nature, high hardness, and smooth waxy polish, commonly found in riverbeds and mountainous regions worldwide.
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