Brookite

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Physical & Optical Properties

Mohs Hardness 5.5 – 6.0
Specific Gravity 3.87 – 4.14
Refractive Index 2.583 – 2.741
Crystal System Orthorhombic
Cleavage Indistinct
Fracture Sub-Conchoidal
Color various
Birefringence 0.117
Pleochroism Nil

Mohs Hardness

Mohs Hardness: 5.5 – 6.0
1 Soft10 Hard

Crystal System

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

Value & Market

Price Tier Budget (< $50/ct)

About Brookite

Brookite is a titanium oxide polymorph of rutile and anatase, forming distinctive pseudo-orthorhombic tabular to striated crystals in brownish-orange, reddish-brown, or near-black tones in metamorphic and hydrothermal veins. Classic localities include Snowdon in Wales, Magnet Cove in Arkansas, and Alpine cleft veins in Switzerland and Norway. Faceted transparent brookite is extraordinarily rare and valued only by specialist collectors.

Jewelry Use

Durability 4/10

Science FYI Family

Frequently Asked Questions

What is Brookite?
Brookite is a titanium oxide polymorph of rutile and anatase, forming distinctive pseudo-orthorhombic tabular to striated crystals in brownish-orange, reddish-brown, or near-black tones in metamorphic and hydrothermal veins. Classic localities include Snowdon in Wales, Magnet Cove in Arkansas, and A
What is the hardness of Brookite?
Brookite has a Mohs hardness of 5.5 to 6.0, making it moderate for use in jewelry.
What color is Brookite?
Brookite is primarily Various.
How much does Brookite cost?
Brookite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Brookite?
Brookite belongs to the Orthorhombic crystal system.

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