mineral

Blue-green copper mineral specimen, likely chrysocolla

Chrysocolla, hydrated copper phyllosilicate — approximately (Cu,Al)₂H₂Si₂O₅(OH)₄·nH₂O; possibly mixed with turquoise or malachite

AI-generated identification · may be incorrect

Bright blue-green, earthy to slightly vitreous luster, usually massive or botryoidal rather than visibly crystalline; Mohs hardness 2.5–3.5, poor cleavage, specific gravity about 2.0–2.4. The rough, mottled texture and turquoise-blue color fit chrysocolla, though a photo cannot confirm the identification.

Identified August 15, 2026More mineral →

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At a glance

Common name: Blue-green copper mineral specimen, likely chrysocolla
Scientific name: Chrysocolla, hydrated copper phyllosilicate — approximately (Cu,Al)₂H₂Si₂O₅(OH)₄·nH₂O; possibly mixed with turquoise or malachite
Category: mineral
Identified: August 15, 2026
Method: Standard

AI Estimated Value

$5–$30 for common small rough specimens; $30–$150+ for attractive, high-grade 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

Forms as a secondary copper mineral in oxidized zones of copper deposits, where acidic groundwater alters primary copper sulfides; commonly associated with malachite, azurite, quartz, and limonite. It is generally geologically young relative to its host ore, forming during later weathering stages.

Uses & applications

Used as a decorative and lapidary stone, in cabochons and carvings, and occasionally as a copper ore; attractive specimens are collected. It is too soft and porous for durable everyday jewelry unless stabilized or protected.

Geological facts

Chrysocolla is often intergrown with turquoise, quartz, and copper oxides, producing misleading trade names such as “chrysocolla turquoise.” It may darken or become chalky with acids, heat, or prolonged moisture exposure.

Field identification & locations

Common localities include Arizona, Nevada, New Mexico, Chile, Peru, the Democratic Republic of Congo, and Australia. Confirm with copper-green streak, low hardness, acid sensitivity, and ideally Raman/XRF testing; value is typically $5–$30 for a small rough piece, or $30–$150+ for vivid, high-quality specimens.