Crocoite

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Physical & Optical Properties

Category Collector Gems
Mohs Hardness 2.5 – 3.0
Specific Gravity 5.9 – 6.1
Refractive Index 2.31 – 2.66
Crystal System Monoclinic
Fracture Conchoidal
Color various
Birefringence 0.35
Pleochroism Distinctly trichroic

Mohs Hardness

Mohs Hardness: 2.5 – 3.0
1 Soft10 Hard

Crystal System

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

Value & Market

Price Tier Budget (< $50/ct)

Where to Buy Crocoite

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About Crocoite

Crocoite is a vivid, flame-orange to red lead chromate mineral that forms spectacular, elongated, striated prismatic crystals with an intense adamantine luster in the oxidized zones of lead ore deposits. The world's finest and most prized specimens come from the Adelaide Mine at Dundas, Tasmania, Australia, where enormous, brilliant orange crystals have produced some of the most spectacular mineral specimens ever found. Despite its stunning color, crocoite's softness and perfect cleavage prevent its use as a cut gem.

Jewelry Use

Durability 1/10

Science FYI Family

Frequently Asked Questions

What is Crocoite?
Crocoite is a vivid, flame-orange to red lead chromate mineral that forms spectacular, elongated, striated prismatic crystals with an intense adamantine luster in the oxidized zones of lead ore deposits. The world's finest and most prized specimens come from the Adelaide Mine at Dundas, Tasmania, Au
What is the hardness of Crocoite?
Crocoite has a Mohs hardness of 2.5 to 3.0, making it relatively soft for use in jewelry.
What color is Crocoite?
Crocoite is primarily Various.
How much does Crocoite cost?
Crocoite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Crocoite?
Crocoite belongs to the Monoclinic crystal system.