mineral

Azurite–malachite specimen (likely azurite-rich copper ore)

Azurite, Cu₃(CO₃)₂(OH)₂, commonly intergrown with malachite, Cu₂CO₃(OH)₂, and limonite/quartz matrix

AI-generated identification · may be incorrect

Deep blue to blue-gray earthy crystalline masses with greenish-brown matrix; vitreous to dull luster, monoclinic crystals, perfect cleavage, Mohs hardness 3.5–4, and specific gravity about 3.7–3.9. The granular metallic-looking areas may include copper sulfides or iron oxides.

Identified September 21, 2026More mineral →

Explore Azurite–malachite specimen (likely azurite-rich copper ore) 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: Azurite–malachite specimen (likely azurite-rich copper ore)
Scientific name: Azurite, Cu₃(CO₃)₂(OH)₂, commonly intergrown with malachite, Cu₂CO₃(OH)₂, and limonite/quartz matrix
Category: mineral
Identified: September 21, 2026
Method: Standard

AI Estimated Value

About $10–$75 for a small ordinary specimen; $100–$500+ for sharply crystallized, vividly colored examples.

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 in the oxidized zones of copper deposits when acidic groundwater alters primary copper sulfide minerals, generally in veins and cavities of the upper crust. It can occur in deposits ranging from Paleozoic to modern geologic ages.

Uses & applications

Collected as a colorful mineral specimen and occasionally cut for decorative objects; historically used as a blue pigment. It is not a major copper ore today.

Geological facts

Azurite commonly alters to green malachite, producing blue-green zoning; its blue streak and reaction to dilute acid help distinguish it from many look-alikes.

Field identification & locations

Look for intense blue color, blue streak, moderate softness, and fizzing with dilute hydrochloric acid; avoid inhaling dust because copper-carbonate powders are toxic. Common localities include Morocco, Namibia, Arizona, Mexico, Australia, and France.