Liddicoatite

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Physical & Optical Properties

Mohs Hardness 7.5
Specific Gravity 3.02
Crystal System Hexagonal
Luster Vitreous
Cleavage Poor
Fracture Uneven,Conchoidal
Color various
Pleochroism Strong: dark brown - light brown

Mohs Hardness

Mohs Hardness: 7.5
1 Soft10 Hard

Crystal System

a a c Hexagonal a = b ≠ c, α = β = 90°, γ = 120°

Value & Market

Price Tier Moderate ($50-500/ct)

About Liddicoatite

Liddicoatite is a calcium lithium aluminum tourmaline, prized for exceptional color zoning that produces spectacular cross-sectional patterns of pink, green, red, and blue in triangular or prismatic forms when cut perpendicular to the c-axis. It was formally described in 1977 from Madagascar and named in honor of gemologist Richard T. Liddicoat. The most spectacular "watermelon" and polychrome liddicoatite cross-sections from Anjanabonoina, Madagascar, are among the most visually stunning collector specimens in tourmaline mineralogy.

Jewelry Use

Durability 8/10

Suitable for daily wear

Science FYI Family

Frequently Asked Questions

What is Liddicoatite?
Liddicoatite is a calcium lithium aluminum tourmaline, prized for exceptional color zoning that produces spectacular cross-sectional patterns of pink, green, red, and blue in triangular or prismatic forms when cut perpendicular to the c-axis. It was formally described in 1977 from Madagascar and nam
What is the hardness of Liddicoatite?
Liddicoatite has a Mohs hardness of 7.5, making it excellent for use in jewelry.
What color is Liddicoatite?
Liddicoatite is primarily Various.
How much does Liddicoatite cost?
Liddicoatite falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Liddicoatite?
Liddicoatite belongs to the Hexagonal crystal system.

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