metamorphic

Polished green-and-white jasper (likely ocean jasper or orbicular jasper)

Microcrystalline quartz/chalcedony (SiO₂) with chlorite, epidote, calcite, and iron-oxide inclusions

AI-generated identification · may be incorrect

Hardness about 6.5–7 Mohs; opaque to slightly translucent, green, cream, and gray mottling; vitreous to waxy luster; cryptocrystalline quartz with no visible cleavage. The elongated specimen is cut and polished, likely shaped as a tower.

Identified September 4, 2026More metamorphic →

Explore Polished green-and-white jasper (likely ocean jasper or orbicular jasper) in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

At a glance

Common name: Polished green-and-white jasper (likely ocean jasper or orbicular jasper)
Scientific name: Microcrystalline quartz/chalcedony (SiO₂) with chlorite, epidote, calcite, and iron-oxide inclusions
Category: metamorphic
Identified: September 4, 2026
Method: Standard

AI Estimated Value

About $15–$60 for a common polished tower; $75–$250+ for large, vivid, well-patterned, or authenticated ocean jasper.

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

Jasper forms when silica-rich fluids replace or cement volcanic ash, lava, or sediment, with later alteration producing green chlorite/epidote colors; it is generally Paleozoic to Cenozoic depending on locality. Orbicular varieties develop concentric mineral-growth patterns during alteration.

Uses & applications

Used for ornamental carvings, cabochons, towers, beads, and decorative stone; it has little industrial value compared with ordinary quartz.

Geological facts

Green jasper is often marketed under locality or trade names, and “ocean jasper” is specifically associated with orbicular material from Madagascar; the exact variety cannot be confirmed from the image alone.

Field identification & locations

Identify by its opaque patterned body, glassy/waxy polish, and inability to scratch with a steel knife; it should not fizz with dilute acid unless calcite is abundant. Common sources include Madagascar, India, Brazil, Australia, and the western United States.