Clinohedrite

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Physical & Optical Properties

Mohs Hardness 5.5
Specific Gravity 3.28 – 3.335
Refractive Index 1.662 – 1.669
Crystal System Monoclinic
Cleavage Perfect
Color various

Mohs Hardness

Mohs Hardness: 5.5
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)

About Clinohedrite

Clinohedrite is an extremely rare calcium zinc silicate hydroxide mineral known almost exclusively from the zinc mining district of Franklin and Sterling Hill, New Jersey, USA—one of the most mineralogically diverse localities on Earth. It forms small, colorless to pale lavender crystals and fluoresces an intense orange-red under UV light, making it a prized fluorescent mineral specimen. Faceted clinohedrite is one of the rarest collector gems imaginable.

Jewelry Use

Durability 4/10

Science FYI Family

Frequently Asked Questions

What is Clinohedrite?
Clinohedrite is an extremely rare calcium zinc silicate hydroxide mineral known almost exclusively from the zinc mining district of Franklin and Sterling Hill, New Jersey, USA—one of the most mineralogically diverse localities on Earth. It forms small, colorless to pale lavender crystals and fluores
What is the hardness of Clinohedrite?
Clinohedrite has a Mohs hardness of 5.5, making it moderate for use in jewelry.
What color is Clinohedrite?
Clinohedrite is primarily Various.
How much does Clinohedrite cost?
Clinohedrite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Clinohedrite?
Clinohedrite belongs to the Monoclinic crystal system.

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