mineral

Weathered copper-bearing rock, possibly malachite/chrysocolla-bearing matrix

Indeterminate; likely copper carbonate/silicate minerals in a host rock, potentially malachite (Cu₂CO₃(OH)₂) or chrysocolla (hydrated copper silicate)

AI-generated identification · may be incorrect

Dark blue-green with rusty orange-brown staining, dull to slightly earthy luster, irregular fracture, and no visible crystal faces; estimated Mohs hardness 2–4, but a photo cannot confirm composition or specific gravity.

Identified August 13, 2026More mineral →

Explore Weathered copper-bearing rock, possibly malachite/chrysocolla-bearing matrix 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: Weathered copper-bearing rock, possibly malachite/chrysocolla-bearing matrix
Scientific name: Indeterminate; likely copper carbonate/silicate minerals in a host rock, potentially malachite (Cu₂CO₃(OH)₂) or chrysocolla (hydrated copper silicate)
Category: mineral
Identified: August 13, 2026
Method: Standard

AI Estimated Value

About $2–$15 as an unidentified rough specimen; potentially $20–$100+ if confirmed as attractive, high-grade malachite or chrysocolla.

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

Likely a weathering-zone specimen formed when copper sulfide minerals oxidized near Earth’s surface, producing green-blue secondary minerals and iron oxides; age depends on its parent deposit.

Uses & applications

Primarily a collecting specimen; attractive polished material may be used ornamentally, while copper-bearing ores can be mined for copper. This rough piece has little commercial value without confirmed mineralization.

Geological facts

Malachite is typically vivid green with banding, whereas chrysocolla is commonly blue-green and earthy; similar colors may also arise from copper-bearing serpentine or slag.

Field identification & locations

Commonly found in oxidized copper deposits worldwide, including Arizona, New Mexico, Chile, Peru, the Democratic Republic of Congo, and Australia. A streak, hardness test, acid reaction, copper assay, or laboratory analysis is needed for reliable identification.