How do I identify Falcon's Eye?

Falcon's Eye can be identified by its hardness of 6.5 - 7 on the Mohs scale, Blue color, Silky, Vitreous luster, Trigonal crystal system. Look for these key characteristics when examining specimens.

What color is Falcon's Eye?

Falcon's Eye typically appears in Blue, blue-grey, blue-green, brown. Color can vary depending on impurities and formation conditions.

How hard is Falcon's Eye?

Falcon's Eye has a hardness of 6.5 - 7 on the Mohs scale. This gives it moderate hardness.

Falcon's Eye

A variety of Tiger's Eye

Uncommon

What is Falcon's Eye?

Falcon's Eye is a blue-gray to blue-green opaque gemstone. It is famed for its movable optical reflectance, or cat’s eye effect. It has a silk-like finish, which is the result of tiny asbestos fibers that are encased in quartz. These fine layers of quartz reflect light and give the stone its characteristic sheen.

Optical Properties

Refractive Index: 1.534-1.540
Birefringence: 0.009
Pleochroism: None
Optical Character: Biaxial positive
Dispersion: 0.013

Discover Values

Rarity

4.0out of 5.0

80%

Popularity

3.7out of 5.0

74%

Beauty

4.4out of 5.0

88%

Cultural Value

4.0out of 5.0

80%

Collection Value

4.3out of 5.0

86%

Falcon's Eye Market Value Calculator

Estimate the market value of Falcon's Eye using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.

Falcon's Eye Localities Map

See where Falcon's Eye is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.

Map preview

North ZoneCentral RidgeSouth Basin

Health & Safety Information

⚠️Harm Reason: Falcon's Eye in powdered form can be toxic due to its Crocidolite Asbestos, Crystalline Silica content.
⚠️Physical Toxicity: Beware of asbestos. Inhalation of asbestos fibres can lead to various dangerous lung conditions, including mesothelioma, asbestosis, and lung cancer. And it can take years for symptoms related to the exposure to appear. Lapidaries should exercise caution when cutting this mineral.
⚠️How to prevent the risks of Falcon's Eye?