Cubic Zirconia

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Physical & Optical Properties

Mohs Hardness 8.5
Specific Gravity 5.5 – 6.0
Refractive Index 2.15 – 2.182
Crystal System Isometric
Color various

Mohs Hardness

Mohs Hardness: 8.5
1 Soft10 Hard

Crystal System

Value & Market

Price Tier Fine ($500-5,000/ct)

About Cubic Zirconia

Cubic zirconia (CZ) is a synthesized crystalline form of zirconium oxide that is the most popular and widely used diamond simulant in the world, prized for its excellent hardness, high refractive index, and strong dispersion—creating impressive diamond-like brilliance at a tiny fraction of diamond's cost. First developed for industrial use by Soviet scientists and introduced commercially in 1976, it can be produced in virtually any color. Though an entirely synthetic material, CZ revolutionized affordable gemstone jewelry.

Jewelry Use

Durability 9/10

Suitable for daily wear

Science FYI Family

Frequently Asked Questions

What is Cubic Zirconia?
Cubic zirconia (CZ) is a synthesized crystalline form of zirconium oxide that is the most popular and widely used diamond simulant in the world, prized for its excellent hardness, high refractive index, and strong dispersion—creating impressive diamond-like brilliance at a tiny fraction of diamond's
What is the hardness of Cubic Zirconia?
Cubic Zirconia has a Mohs hardness of 8.5, making it excellent for use in jewelry.
What color is Cubic Zirconia?
Cubic Zirconia is primarily Various.
How much does Cubic Zirconia cost?
Cubic Zirconia falls into the Fine ($500-5,000/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Cubic Zirconia?
Cubic Zirconia belongs to the Isometric crystal system.

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