Caledonite

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Physical & Optical Properties

Category Collector Gems
Mohs Hardness 2.5 – 3.0
Specific Gravity 5.6 – 5.76
Refractive Index 1.818 – 1.909
Crystal System Orthorhombic
Cleavage Perfect,Imperfect
Fracture Uneven
Color various
Pleochroism Weak

Mohs Hardness

Mohs Hardness: 2.5 – 3.0
1 Soft10 Hard

Crystal System

a b c Orthorhombic a ≠ b ≠ c, α = β = γ = 90°

Value & Market

Price Tier Budget (< $50/ct)

Where to Buy Caledonite

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About Caledonite

Caledonite is an exquisite but rare deep blue-green copper lead sulfate carbonate mineral forming small prismatic crystals in the oxidized zones of copper-lead ore deposits. Named after Caledonia (Scotland), where it was first found, the finest specimens come from mines in Chile, England, and the Mojave Desert in California. Its brilliant, saturated blue-green color and extreme rarity make it a highly coveted collector mineral, though it is never faceted.

Jewelry Use

Durability 1/10

Science FYI Family

Frequently Asked Questions

What is Caledonite?
Caledonite is an exquisite but rare deep blue-green copper lead sulfate carbonate mineral forming small prismatic crystals in the oxidized zones of copper-lead ore deposits. Named after Caledonia (Scotland), where it was first found, the finest specimens come from mines in Chile, England, and the Mo
What is the hardness of Caledonite?
Caledonite has a Mohs hardness of 2.5 to 3.0, making it relatively soft for use in jewelry.
What color is Caledonite?
Caledonite is primarily Various.
How much does Caledonite cost?
Caledonite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Caledonite?
Caledonite belongs to the Orthorhombic crystal system.