Hibonite
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Physical & Optical Properties
Category
Semi-Precious Gems
Mohs Hardness
7.5 – 8.0
Specific Gravity
3.84
Refractive Index
1.79 – 1.807
Crystal System
Hexagonal
Luster
Vitreous
Cleavage
Good
Fracture
Sub-Conchoidal
Color
various
Pleochroism
Brownish gray - gray
Mohs Hardness
| Mohs | Reference mineral | Hibonite |
|---|---|---|
| 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
Moderate ($50-500/ct)
Where to Buy Hibonite
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 Hibonite
ヒボナイトは、カルシウムアルミニウム酸化物（CaAl₁₂O₁₉）で、褐色から黒色の六角板状結晶が特徴の希少鉱物です。マダガスカルで初めて発見され、鉱物学者ポール・イボンに因んで命名されました。宝石質の透明な標本は非常に稀で、主に鉱物コレクターの間で知られています。
On this page
Jewelry Use
Durability
8/10
Suitable for daily wear
Science FYI Family
Frequently Asked Questions
What is Hibonite?
ヒボナイトは、カルシウムアルミニウム酸化物（CaAl₁₂O₁₉）で、褐色から黒色の六角板状結晶が特徴の希少鉱物です。マダガスカルで初めて発見され、鉱物学者ポール・イボンに因んで命名されました。宝石質の透明な標本は非常に稀で、主に鉱物コレクターの間で知られています。
What is the hardness of Hibonite?
Hibonite has a Mohs hardness of 7.5 to 8.0, making it excellent for use in jewelry.
What color is Hibonite?
Hibonite is primarily Various.
How much does Hibonite cost?
Hibonite falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Hibonite?
Hibonite belongs to the Hexagonal crystal system.