Malachite
What is Malachite?
Malachite is a copper carbonate hydroxide mineral, often found in the oxidized zones of copper ore deposits. It is known for its vibrant green color and distinctive banded patterns. Malachite is a relatively soft mineral and is often used for ornamental purposes, such as carvings, jewelry, and decorative objects. It has been used since ancient times and is associated with protection and transformation.
Optical Properties
- Refractive Index
- 1.655 - 1.909
- Birefringence
- 0.250
- Pleochroism
- Strong
- X = pale yellow-green, Y = dark green, Z = bluish green
- Optical Character
- biaxial (-)
- Dispersion
- 0.044
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Malachite before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Where to Find Malachite
RockHoundR, the free-to-download rockhounding map from the Ruby Glint team, shows where collectors find malachite in the US, with land-access notes for BLM land and national forests. Collecting is banned in national parks.
See where to find malachiteAlways check the local rules and get the landowner's permission before you collect.
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Quick Facts
Physical Properties
- Color
- Green, various shades and patterns
- Hardness (Mohs)
- 3.5 - 4
- Rock tumbling
- Not recommended
- Density
- 3.6 - 4.0 g/cm³
- Streak
- Light green
Chemical Properties
- Chemical Formula
- Cu2CO3(OH)2
- Elements
- Copper, Carbon, Oxygen, Hydrogen
Also Known As
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Malachite FAQs
How do I identify Malachite?
Malachite can be identified by its hardness of 3.5 - 4 on the Mohs scale, Green color. Look for these key characteristics when examining specimens.
What color is Malachite?
Malachite typically appears in Green, various shades and patterns. Color can vary depending on impurities and formation conditions.
How hard is Malachite?
Malachite has a hardness of 3.5 - 4 on the Mohs scale. This gives it moderate hardness.