Ludlamite

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Physical & Optical Properties

Mohs Hardness 3.0 – 4.0
Specific Gravity 3.1 – 3.2
Refractive Index 1.653 – 1.693
Crystal System Monoclinic
Luster Vitreous
Cleavage Perfect
Fracture Uneven
Color various
Birefringence 0.04
Pleochroism Nil

Mohs Hardness

Mohs Hardness: 3.0 – 4.0
1 Soft10 Hard

Crystal System

β a b c Monoclinic a ≠ b ≠ c, α = γ = 90°, β ≠ 90°

Value & Market

Price Tier Budget (< $50/ct)

About Ludlamite

Ludlamite is a hydrated iron magnesium manganese phosphate mineral, forming vivid apple-green to bright emerald-green prismatic to tabular monoclinic crystals with a vitreous luster in phosphate-rich granite pegmatites. It was first described in 1877 from Wheal Jane mine in Cornwall, England, and notable specimens come from the Huanuni mine in Bolivia, Palermo mine in New Hampshire, USA, and other phosphate pegmatites. The bright emerald-green color and excellent crystal habit make ludlamite one of the most visually striking of all phosphate mineral collector specimens.

Jewelry Use

Durability 2/10

Science FYI Family

Frequently Asked Questions

What is Ludlamite?
Ludlamite is a hydrated iron magnesium manganese phosphate mineral, forming vivid apple-green to bright emerald-green prismatic to tabular monoclinic crystals with a vitreous luster in phosphate-rich granite pegmatites. It was first described in 1877 from Wheal Jane mine in Cornwall, England, and no
What is the hardness of Ludlamite?
Ludlamite has a Mohs hardness of 3.0 to 4.0, making it relatively soft for use in jewelry.
What color is Ludlamite?
Ludlamite is primarily Various.
How much does Ludlamite cost?
Ludlamite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Ludlamite?
Ludlamite belongs to the Monoclinic crystal system.

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