mineral

White Ocean Jasper (polished heart)

Jasper, microcrystalline quartz (SiO₂), with likely chalcedony and iron/manganese-rich inclusions

AI-generated identification · may be incorrect

Opaque cream-white polished surface with gray, black, tan, and rusty patterned bands; waxy to vitreous luster; hardness about 6.5–7 Mohs; no visible cleavage; cryptocrystalline quartz structure. The piece appears cut and polished, possibly stabilized or coated.

Identified August 25, 2026More mineral →

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At a glance

Common name: White Ocean Jasper (polished heart)
Scientific name: Jasper, microcrystalline quartz (SiO₂), with likely chalcedony and iron/manganese-rich inclusions
Category: mineral
Identified: August 25, 2026
Method: Standard

AI Estimated Value

Approximately $10–$40 for a common polished heart; $50–$150+ for larger, vividly patterned, authenticated Madagascar material.

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, breccia, or other sediments; coloration comes from iron and manganese oxides. “Ocean jasper” is mainly associated with Oligocene–Miocene volcanic rocks of Madagascar, roughly 5–30 million years old.

Uses & applications

Used for cabochons, carvings, beads, hearts, and decorative objects; not generally used in construction because it is valued as an ornamental stone.

Geological facts

The term Ocean Jasper is a trade name rather than a single mineral species. Orbicular and brecciated patterns are especially prized, though this specimen shows mostly layered/brecciated texture.

Field identification & locations

Identify by its opaque silica-rich body, hardness, conchoidal fracture, and natural irregular banding; it should not fizz in dilute acid. Common sources include Madagascar, Oregon, Mexico, and Australia; avoid prolonged soaking or harsh chemicals.