metamorphic

Rhodonite-bearing metamorphic pebble

Rhodonite (MnSiO₃) in manganese-rich silicate rock, possibly with quartz or feldspar

AI-generated identification · may be incorrect

Pink to rose-red, gray-green weathered matrix, opaque, with a dull to vitreous luster; rhodonite is triclinic and has Mohs hardness 5.5–6.5, while the whole pebble may be tougher and finer-grained.

Identified August 31, 2026More metamorphic →

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At a glance

Common name: Rhodonite-bearing metamorphic pebble
Scientific name: Rhodonite (MnSiO₃) in manganese-rich silicate rock, possibly with quartz or feldspar
Category: metamorphic
Identified: August 31, 2026
Method: Standard

AI Estimated Value

About $1–$10 as an ordinary field-collected pebble; attractive polished or strongly patterned rhodonite specimens may sell for $20–$100 or more.

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

Pink to rose-red, gray-green weathered matrix, opaque, with a dull to vitreous luster; rhodonite is triclinic and has Mohs hardness 5.5–6.5, while the whole pebble may be tougher and finer-grained.

Formation & geological history

Likely formed by metamorphism of manganese-rich sediments or volcanic rocks, generally in Precambrian to younger metamorphic terranes. The rounded shape indicates transport and abrasion in a stream, beach, or glacial setting.

Uses & applications

Rhodonite is used as a lapidary stone for cabochons, carvings, and tumbled specimens; low-grade material has limited industrial manganese value. This small rough pebble is mainly a collector specimen.

Geological facts

Rhodonite’s characteristic pink color comes from manganese, and black manganese-oxide veining is common, though not obvious here. Similar pink rocks include rhodochrosite, pink feldspar, and altered jasper.

Field identification & locations

Look for salmon-pink color, gray or black veins, opaque texture, and hardness sufficient to resist scratching by a steel knife. Common sources include Russia, Australia, Peru, Sweden, and the United States, especially Massachusetts and Colorado.