Anorthoclase

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Physical & Optical Properties

Mohs Hardness 6.0 – 6.5
Specific Gravity 2.56 – 2.62
Refractive Index 1.518 – 1.534
Crystal System Monoclinic
Luster Vitreous,Pearly
Fracture Uneven,Conchoidal
Color various
Birefringence 0.006
Pleochroism Weak

Mohs Hardness

1 Talc 2 Gypsum 3 Calcite 4 Fluorite 5 Apatite 6 Orthoclase 7 Quartz 8 Topaz 9 Corundum 10 Diamond Anorthoclase
Mohs hardness of Anorthoclase shown against the ten reference minerals, from talc (1) to diamond (10).
Mohs Reference mineral Anorthoclase
1 Talc
2 Gypsum
3 Calcite
4 Fluorite
5 Apatite
6 Orthoclase
7 Quartz
8 Topaz
9 Corundum
10 Diamond

Crystal System

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

Value & Market

Price Tier Moderate ($50-500/ct)

About Anorthoclase

アノルソクレースは、月長石に似た美しい青から白のアデュラレッセンスを示すことのあるナトリウム質アルカリ長石です。タンザニアのキリマンジャロ山周辺が有名な宝石産地で、浮遊するような光彩が月光を思わせる独特の美しさを持ちます。アノルソクレースを原石とした月長石は微妙な色調が特徴的です。

Science FYI Family

Frequently Asked Questions

What is Anorthoclase?
アノルソクレースは、月長石に似た美しい青から白のアデュラレッセンスを示すことのあるナトリウム質アルカリ長石です。タンザニアのキリマンジャロ山周辺が有名な宝石産地で、浮遊するような光彩が月光を思わせる独特の美しさを持ちます。アノルソクレースを原石とした月長石は微妙な色調が特徴的です。
What is the hardness of Anorthoclase?
Anorthoclase has a Mohs hardness of 6.0 to 6.5, making it moderate for use in jewelry.
What color is Anorthoclase?
Anorthoclase is primarily Various.
How much does Anorthoclase cost?
Anorthoclase falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Anorthoclase?
Anorthoclase belongs to the Monoclinic crystal system.

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