Falcon's Eye

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Physical & Optical Properties

Mohs Hardness 7.0
Specific Gravity 2.58 – 2.64
Refractive Index 1.534 – 1.54
Crystal System Trigonal
Luster Silky
Cleavage None
Fracture Irregular
Color various
Pleochroism Absent

Mohs Hardness

Mohs Hardness: 7.0
1 Soft10 Hard

Crystal System

a a a Trigonal (Rhombohedral) a = b = c, α = β = γ ≠ 90°

Value & Market

Price Tier Moderate ($50-500/ct)

About Falcon's Eye

Falcon's eye, also called hawk's eye, is the blue-gray to blue-green chatoyant variety of quartz pseudomorphous after crocidolite asbestos, where silica has replaced the fibrous blue asbestos fibers while retaining their parallel alignment and chatoyant optical effect. It is considered the precursor to tiger's eye, which develops the additional golden color from iron oxidation. Falcon's eye is found primarily in South Africa and displays a cool, steely chatoyancy distinct from the warm glow of tiger's eye.

Jewelry Use

Durability 7/10

Suitable for daily wear

Science FYI Family

Frequently Asked Questions

What is Falcon's Eye?
Falcon's eye, also called hawk's eye, is the blue-gray to blue-green chatoyant variety of quartz pseudomorphous after crocidolite asbestos, where silica has replaced the fibrous blue asbestos fibers while retaining their parallel alignment and chatoyant optical effect. It is considered the precursor
What is the hardness of Falcon's Eye?
Falcon's Eye has a Mohs hardness of 7.0, making it excellent for use in jewelry.
What color is Falcon's Eye?
Falcon's Eye is primarily Various.
How much does Falcon's Eye cost?
Falcon's Eye falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Falcon's Eye?
Falcon's Eye belongs to the Trigonal crystal system.

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