Thulite

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Physical & Optical Properties

Mohs Hardness 6.0 – 7.0
Specific Gravity 3.1
Refractive Index 1.695
Crystal System Orthorhombic
Cleavage Perfect
Fracture Conchoidal
Color various
Birefringence 0.006

Mohs Hardness

Mohs Hardness: 6.0 – 7.0
1 Soft10 Hard

Crystal System

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

Value & Market

Price Tier Moderate ($50-500/ct)

About Thulite

Thulite is an opaque to translucent rose-pink to reddish variety of the mineral zoisite, whose color is caused by manganese substituting for calcium in the crystal structure, found primarily in Norway, the United States, and Western Australia. It was named after Thule, the ancient mythological name for Norway, where it was first discovered in 1820, and is used extensively for cabochons, carvings, and decorative objects. Its mottled rose-pink appearance with white calcite veining gives it a distinctive organic quality.

Jewelry Use

Durability 5/10

Science FYI Family

Frequently Asked Questions

What is Thulite?
Thulite is an opaque to translucent rose-pink to reddish variety of the mineral zoisite, whose color is caused by manganese substituting for calcium in the crystal structure, found primarily in Norway, the United States, and Western Australia. It was named after Thule, the ancient mythological name
What is the hardness of Thulite?
Thulite has a Mohs hardness of 6.0 to 7.0, making it moderate for use in jewelry.
What color is Thulite?
Thulite is primarily Various.
How much does Thulite cost?
Thulite falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Thulite?
Thulite belongs to the Orthorhombic crystal system.

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