sedimentary

Jasper (Green Jasper / Moss Agate variety)

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 6.5-7 on Mohs scale. Color: Pale green to grey-green. Luster: Vitreous to waxy. Crystal Structure: Trigonal (microcrystalline/cryptocrystalline). Specific Gravity: 2.6-2.9.

Hardness: 6
Color: Pale green to grey-green
Luster: Vitreous to waxy

Identified June 24, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 on Mohs scale. Color: Pale green to grey-green. Luster: Vitreous to waxy. Crystal Structure: Trigonal (microcrystalline/cryptocrystalline). Specific Gravity: 2.6-2.9.

Formation & geological history

Formed from silica deposits in sedimentary or volcanic environments, often involving the infiltration of silica-rich fluids into cavities or cracks in other rocks. Associated with ancient volcanic activity and silicate precipitation.

Uses & applications

Commonly used for lapidary work, decorative cabochons, metaphysical crystals, and jewelry. It is also a popular collector's item for those interested in quartz varieties.

Geological facts

Jasper has been a favorite gemstone since antiquity; it is mentioned in several ancient texts and was used as seal stones in Minoan Crete. The green variety is often associated with growth and renewal in historical folklore.

Field identification & locations

Identify in the field by its hardness (cannot be scratched by a steel knife), smooth waxy feel when polished, and opacity. Commonly found in riverbeds or coastal areas where silica-rich rocks have weathered.