sedimentary

Jasper (Cream/Yellow variety)

Silicon dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 6.5-7 on Mohs scale. Color: Cream, tan, and yellow with brown banding. Luster: Vitreous to waxy. Crystal Structure: Hexagonal (microcrystalline). Cleavage: None. Specific Gravity: 2.58-2.91.

Hardness: 6
Color: Cream, tan, and yellow with brown banding
Luster: Vitreous to waxy

Identified May 16, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the infiltration of silica-rich fluids into sediment or volcanic ash, occurring in various geological ages. Over time, the silica crystallizes into a dense, microcrystalline quartz structure.

Uses & applications

Used primarily in lapidary work for making cabochons, beads, and decorative ornaments. Also popular as a pocket stone or for tumbling.

Geological facts

Jasper is an opaque variety of chalcedony. The name comes from the Greek 'iaspis', meaning 'spotted stone'. It is known for its remarkable variety of patterns caused by chemical impurities during formation.

Field identification & locations

Identify by its hardness (will scratch glass), smooth waxy feel when polished, and opacity. Commonly found in riverbeds, beaches, and desert regions globally, particularly in the Western United States and India.