sedimentary (geologically classified as a variety of chalcedony/quartz)

Ocean Jasper (Orbicular Jasper)

Silicon Dioxide (SiO2) with various inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale); Color: Mottled green, white, gray, and brown; Luster: Vitreous to waxy; Crystal structure: Microcrystalline/Trigonal (Hexagonal); Cleavage: None (conchoidal fracture); Specific gravity: 2.58-2.91

Hardness: 6
Color: Mottled green, white, gray, and brown
Luster: Vitreous to waxy

Identified March 11, 2026More sedimentary (geologically classified as a variety of chalcedony/quartz) →

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At a glance

Common name: Ocean Jasper (Orbicular Jasper)
Scientific name: Silicon Dioxide (SiO2) with various inclusions
Category: sedimentary (geologically classified as a variety of chalcedony/quartz)
Identified: March 11, 2026
Method: Standard

AI Estimated Value

$10-$50 for small tumble stones or slabs; $100-$1,000+ for large, high-quality display specimens with vibrant orbicular patterns

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Formed through the accumulation of silica-rich volcanic flows or hydrothermal activity where silica precipitates in cavities, creating orbicular (eye-like) patterns. The primary deposits are found in the shorelines of Madagascar.

Uses & applications

Primarily used in the jewelry industry for cabochons, beads, and carvings. It is a highly popular collector's mineral and is frequently used in 'metamorphic' or 'holistic' stone therapy.

Geological facts

Ocean Jasper is technically only found on the coast of Madagascar. Many veins can only be reached by boat and mined during low tide, which is how it earned its name. It is known for its distinct 'orbs' or spherical inclusions.

Field identification & locations

Identify in the field by its high hardness (cannot be scratched by a steel knife), smooth waxy feel when polished, and distinctive circular or 'flower' patterning. Commonly found in coastal Madagascar and occasionally as similar rhyolitic jaspers in the American West.