Gemstone profile and identification guide
Malachite
Malachite is an opaque copper carbonate mineral recognized by vivid green banding.
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Overview
Malachite is an opaque copper carbonate mineral recognized by vivid green banding.
Did you know? Russian Ural malachite became famous for architectural decorative stone use in the 18th and 19th centuries.
Use this profile as a collector reference and educational guide for quick on-page comparison, then validate with the interactive identification system.
Identification
Name: Malachite
Scientific classification: Carbonate (Malachite)
Hardness: 3.75 Mohs
Transparency: opaque
Lustre: silky
Crystal system: Monoclinic
Primary colour: Green
Secondary colour: Dark Green
Colour family: Greens
Identified by opaque green banding, low hardness, and association with copper mineral assemblages.
Verification Status
Status: verified-core-fields
Reference priority: GIA, Gem-A, Mindat, International Gem Society
Core identity, locality, and physical-property fields reviewed against standard gemological references.
Values are given as practical gemological ranges where appropriate.
Physical Properties
Hardness category: medium
Hardness value: 3.75 Mohs
Chemical composition: Copper carbonate hydroxide [Cu2CO3(OH)2]
Crystal system: Monoclinic
Common locations: Democratic Republic of the Congo, Zambia, Namibia, Russia (Ural), Australia
Learn more: Gem-A gemstone education resources.
Colour Variations
Opaque green copper carbonate with concentric or fibrous banding.
Optical effects: Banded Structure
Detailed Gemology
Mineral species: Malachite
Mineral group: Carbonate group
Chemical formula: Copper carbonate hydroxide [Cu2CO3(OH)2]
Mohs hardness: 3.75
Crystal system: Monoclinic
Lustre: silky
Transparency: opaque
Streak: Light green
Cleavage: Perfect in one direction
Fracture: Splintery to uneven
Specific gravity: 3.60-4.05
Refractive index: 1.655-1.909
Optical phenomena: Banded structure
Colour range: Light to dark green, often banded
Common inclusions: Azurite, chrysocolla, cuprite, host-rock matrix
Geological environment: Oxidized copper ore zones
Principal mining regions: Democratic Republic of the Congo, Zambia, Namibia, Russia (Ural), Australia
Important commercial sources: Most modern gem-quality malachite is sourced from central and southern African copper districts
Historical significance: Important ornamental stone in Russian and European decorative arts.
Common treatments: Waxing and resin stabilization are common.
Synthetic or imitation forms: Reconstituted composites and plastic/glass imitations are common.
Common look-alikes: Dyed jasper, chrysocolla-rich rock, green glass
Jewellery uses: Used in cabochons, beads, carvings, and inlay panels.
Care recommendations: Soft and acid-sensitive. Avoid abrasives, acids, ultrasonic, and steam cleaning.
Cross-check profile data with GIA Gem Encyclopedia and Mindat entry for Malachite.
Formation
Forms as a secondary mineral in oxidized zones of copper deposits through supergene alteration.
Origin
Most modern gem-quality malachite is sourced from central and southern African copper districts
Uses
Best for: Used in cabochons, beads, carvings, and inlay panels.
Ideal uses: Protected settings and ornamental pieces where bold green banding is the main feature.
Care
Soft and acid-sensitive. Avoid abrasives, acids, ultrasonic, and steam cleaning.
Need another candidate? Use advanced gemstone search or return to the identification guide.
Related gemstones by colour
Related gemstones by hardness
Commonly confused gemstones
Malachite FAQ
How can I identify Malachite?
Compare hardness (3.75 Mohs), crystal system (Monoclinic), colour profile, and lustre (silky) with your sample. Then cross-check related gemstones listed above.
What colour range does Malachite appear in?
Opaque green copper carbonate with concentric or fibrous banding.
Where is Malachite commonly used?
Protected settings and ornamental pieces where bold green banding is the main feature.. For maintenance, follow the care guidance in this profile.
Scientific References
GIA: general gemstone identity (reviewed) - Batch 01 factual verification pass.
Gem-A: gemological terminology and testing references (reviewed) - Batch 01 factual verification pass.
Mindat: mineral species and principal localities (reviewed) - Batch 01 factual verification pass.
International Gem Society: gem trade context and treatment overview (reviewed) - Batch 01 factual verification pass.