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
ブルッカイトはルチル・アナテースと同質異像の関係にある二酸化チタンの多形体で、擬斜方晶の板状から条線状の結晶を形成します。褐色・赤褐色・黒色の独特の結晶形が鉱物標本として高く評価され、アルプス・パキスタン・アーカンソーが代表的産地です。宝石用途は稀ですがコレクター向けに研磨されることがあります。
On this page
Jewelry Use
Durability
4/10
Science FYI Family
Frequently Asked Questions
What is Brookite?
ブルッカイトはルチル・アナテースと同質異像の関係にある二酸化チタンの多形体で、擬斜方晶の板状から条線状の結晶を形成します。褐色・赤褐色・黒色の独特の結晶形が鉱物標本として高く評価され、アルプス・パキスタン・アーカンソーが代表的産地です。宝石用途は稀ですがコレクター向けに研磨されることがあります。
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.