Brucite

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Physical & Optical Properties

Category Collector Gems
Mohs Hardness 2.5
Specific Gravity 2.39
Refractive Index 1.56 – 1.6
Crystal System Trigonal
Cleavage Perfect
Color various
Birefringence 0.01

Mohs Hardness

Mohs Hardness: 2.5
1 Soft10 Hard

Crystal System

a a a Trigonal (Rhombohedral) a = b = c, α = β = γ ≠ 90°

Value & Market

Price Tier Budget (< $50/ct)

Where to Buy Brucite

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About Brucite

Brucite is a magnesium hydroxide mineral forming platy, waxy white to pale green, yellow, or blue crystals in serpentinite and marble, and is commercially extracted as a magnesium ore. Rare transparent to translucent yellow or light blue specimens from Nevada and Pakistan are occasionally cut as collector gems with a pearly to waxy luster. Its very low hardness limits its use in jewelry, but translucent blue material can be attractive.

Jewelry Use

Durability 1/10

Science FYI Family

Frequently Asked Questions

What is Brucite?
Brucite is a magnesium hydroxide mineral forming platy, waxy white to pale green, yellow, or blue crystals in serpentinite and marble, and is commercially extracted as a magnesium ore. Rare transparent to translucent yellow or light blue specimens from Nevada and Pakistan are occasionally cut as col
What is the hardness of Brucite?
Brucite has a Mohs hardness of 2.5, making it relatively soft for use in jewelry.
What color is Brucite?
Brucite is primarily Various.
How much does Brucite cost?
Brucite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Brucite?
Brucite belongs to the Trigonal crystal system.