Diaspore

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Physical & Optical Properties

Mohs Hardness 6,5 – 7,0
Specific Gravity 3,3 – 3,4
Refractive Index 1,702 – 1,75
Crystal System Orthorhombic
Cleavage Perfect
Color various
Birefringence 0,048

Mohs Hardness

Mohs Hardness: 6,5 – 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 Diaspore

Diaspore is an aluminum oxide hydroxide mineral notable for its remarkable color-change variety found in Turkey, which shifts from champagne and kiwi green in daylight to raspberry pink and purple-rose under incandescent light. Marketed as 'Zultanite' or 'Csarite,' Turkish color-change diaspore is the only significant gem source in the world, producing material rivaling the finest alexandrite in color-change intensity. Its pleochroism, color change, and high clarity make it one of the most compelling modern colored gem discoveries.

Jewelry Use

Durability 6/10

Science FYI Family

Frequently Asked Questions

What is Diaspore?
Diaspore is an aluminum oxide hydroxide mineral notable for its remarkable color-change variety found in Turkey, which shifts from champagne and kiwi green in daylight to raspberry pink and purple-rose under incandescent light. Marketed as 'Zultanite' or 'Csarite,' Turkish color-change diaspore is t
What is the hardness of Diaspore?
Diaspore has a Mohs hardness of 6.5 to 7.0, making it moderate for use in jewelry.
What color is Diaspore?
Diaspore is primarily Various.
How much does Diaspore cost?
Diaspore falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Diaspore?
Diaspore belongs to the Orthorhombic crystal system.

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