sedimentary
Jasper Pebble
Microcrystalline Quartz (SiO2)
Hardness of 6.5-7 on the Mohs scale, typically brown, red, green, or yellow in color, with a waxy to dull luster. It has a cryptocrystalline structure and conchoidal fracture.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, typically brown, red, green, or yellow in color, with a waxy to dull luster. It has a cryptocrystalline structure and conchoidal fracture.
Formation & geological history
Formed from silica-rich solutions precipitating in sedimentary environments or hydrothermal veins, often over millions of years.
Uses & applications
Commonly used in lapidary work, cabochons, ornamentation, and as tumbled stones for collectors.
Geological facts
Jasper has been used since ancient times for amulets, seals, and jewelry. The name means 'spotted or speckled stone.'
Field identification & locations
Found worldwide in riverbeds, beaches, and gravel deposits as water-worn pebbles. Identified by its hardness, opacity, and smooth waxy feel.
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