Anorthite
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Physical & Optical Properties
Category
Semi-Precious Gems
Mohs Hardness
6.0 – 6.5
Specific Gravity
2.77
Refractive Index
1.575 – 1.588
Crystal System
Triclinic
Luster
Vitreous,Dull (Earthy)
Cleavage
Perfect
Fracture
Uneven,Conchoidal
Color
various
Birefringence
0.013
Mohs Hardness
| Mohs | Reference mineral | Anorthite |
|---|---|---|
| 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 Anorthite
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 Anorthite
钙长石是斜长石系列中含钙量最高的端元矿物，通常呈白色至灰色，具有玻璃光泽。这种矿物主要分布于镁铁质火成岩中，在月球岩石（斜长岩）中大量存在。宝石级钙长石相对少见，偶尔呈现出晕彩效应。日本奈良的新月长石（月长石）是著名的宝石级钙长石品种。
On this page
Jewelry Use
Durability
5/10
Science FYI Family
Frequently Asked Questions
What is Anorthite?
钙长石是斜长石系列中含钙量最高的端元矿物，通常呈白色至灰色，具有玻璃光泽。这种矿物主要分布于镁铁质火成岩中，在月球岩石（斜长岩）中大量存在。宝石级钙长石相对少见，偶尔呈现出晕彩效应。日本奈良的新月长石（月长石）是著名的宝石级钙长石品种。
What is the hardness of Anorthite?
Anorthite has a Mohs hardness of 6.0 to 6.5, making it moderate for use in jewelry.
What color is Anorthite?
Anorthite is primarily Various.
How much does Anorthite cost?
Anorthite falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Anorthite?
Anorthite belongs to the Triclinic crystal system.