Milarite

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Physical & Optical Properties

Mohs Hardness 5,5 – 6,0
Specific Gravity 2,52 – 2,6
Refractive Index 1,529 – 1,56
Crystal System Hexagonal
Luster Vitreous
Cleavage Imperfect
Fracture Uneven,Conchoidal
Color various

Mohs Hardness

Mohs Hardness: 5,5 – 6,0
1 Soft10 Hard

Crystal System

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

Value & Market

Price Tier Budget (< $50/ct)

About Milarite

Milarite is a rare potassium calcium beryllium aluminum silicate mineral forming colorless to pale green hexagonal prismatic crystals with a vitreous luster in alpine clefts and pegmatites. It was first described from Val Milar in Graubünden, Switzerland, in 1870, with additional occurrences in the Czech Republic, USA, and Brazil. Faceted milarite gems are exceptionally rare collector pieces valued for their beautiful crystal habit and the unusual beryllium-silicate composition.

Jewelry Use

Durability 4/10

Science FYI Family

Frequently Asked Questions

What is Milarite?
Milarite is a rare potassium calcium beryllium aluminum silicate mineral forming colorless to pale green hexagonal prismatic crystals with a vitreous luster in alpine clefts and pegmatites. It was first described from Val Milar in Graubünden, Switzerland, in 1870, with additional occurrences in the
What is the hardness of Milarite?
Milarite has a Mohs hardness of 5.5 to 6.0, making it moderate for use in jewelry.
What color is Milarite?
Milarite is primarily Various.
How much does Milarite cost?
Milarite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Milarite?
Milarite belongs to the Hexagonal crystal system.

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