sedimentary

Orbicular Jasper (Ocean Jasper or Poppy Jasper variant)

Silicon Dioxide (SiO2) with various inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale), Color: Brown, tan, and grey with 'orb' patterns, Luster: Dull/Waxy (unfinished), Crystal Structure: Trigonal/Microcrystalline (Cryptocrystalline quartz), Cleavage: None

Hardness: 6

Identified April 6, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 (Mohs scale), Color: Brown, tan, and grey with 'orb' patterns, Luster: Dull/Waxy (unfinished), Crystal Structure: Trigonal/Microcrystalline (Cryptocrystalline quartz), Cleavage: None

Formation & geological history

Formed from silica-rich fluids precipitating in crevices or gas pockets of volcanic rocks or sedimentary environments. These 'orbs' occur as spherulitic structures during the crystallization of the silica.

Uses & applications

Primarily used for lapidary work, including tumbling for decorative stones, cabochons for jewelry, and as a collectible specimen for rockhounds.

Geological facts

Jasper is an opaque variety of chalcedony. The 'orbicular' pattern is relatively rare and caused by the radial growth of fibrous minerals (like feldspar or quartz) within the jasper matrix.

Field identification & locations

Identify in the field by its distinct circular patterns (eyes/orbs) and its hardness—it will scratch glass and cannot be scratched by a steel knife. Frequently found in beach gravels or riverbanks in areas with volcanic activity.