Labradorite

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Physical & Optical Properties

Mohs Hardness 6.0 – 6.5
Specific Gravity 2.69 – 2.72
Refractive Index 1.554 – 1.573
Crystal System Triclinic
Luster Vitreous
Cleavage Perfect
Fracture Uneven
Color various
Birefringence 0.007
Pleochroism From the Congo, red stones show weak pleochroism whilst greenstones have distinct greenish yellow to bluish green pleochroism

Mohs Hardness

Mohs Hardness: 6.0 – 6.5
1 Soft10 Hard

Crystal System

a b c Triclinic a ≠ b ≠ c, α ≠ β ≠ γ ≠ 90°

Value & Market

Price Tier Moderate ($50-500/ct)

About Labradorite

Labradorite is a calcium-rich plagioclase feldspar celebrated for its spectacular labradorescence—a vivid iridescent play of color in blue, gold, green, orange, and red caused by light interference between lamellar twinning layers in its structure. First discovered in 1770 on the Labrador Peninsula of Canada (its namesake), major gem sources now include Madagascar, Finland, and Mexico, where the Finnish variety "spectrolite" shows particularly dramatic full-spectrum iridescence. Labradorite is one of the most widely used decorative stones in modern jewelry and lapidary arts.

Jewelry Use

Durability 5/10

Science FYI Family

Frequently Asked Questions

What is Labradorite?
Labradorite is a calcium-rich plagioclase feldspar celebrated for its spectacular labradorescence—a vivid iridescent play of color in blue, gold, green, orange, and red caused by light interference between lamellar twinning layers in its structure. First discovered in 1770 on the Labrador Peninsula
What is the hardness of Labradorite?
Labradorite has a Mohs hardness of 6.0 to 6.5, making it moderate for use in jewelry.
What color is Labradorite?
Labradorite is primarily Various.
How much does Labradorite cost?
Labradorite falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Labradorite?
Labradorite belongs to the Triclinic crystal system.

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