Brookite
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Physical & Optical Properties
Category
Semi-Precious Gems
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 | Reference mineral | Brookite |
|---|---|---|
| 1 | Talc | |
| 2 | Gypsum | |
| 3 | Calcite | |
| 4 | Fluorite | |
| 5 | Apatite | |
| 6 | Orthoclase | ● |
| 7 | Quartz | |
| 8 | Topaz | |
| 9 | Corundum | |
| 10 | Diamond |
Crystal System
Value & Market
Price Tier
Budget (< $50/ct)
Where to Buy Brookite
Blue Nile
Fine jewelry retailer
James Allen
Gemstone jewelry
Brilliant Earth
Ethically sourced gems
Amazon
Wide selection
Links may earn a commission at no extra cost to you.
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.
On this page
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.