Binghamite

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Physical & Optical Properties

Mohs Hardness 6.5 – 7.0
Specific Gravity 2.55 – 2.7
Refractive Index 1.53 – 1.543
Crystal System Trigonal
Luster Waxy,Resinous
Color various
Birefringence 0.003

Mohs Hardness

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

Crystal System

a a a Trigonal (Rhombohedral) a = b = c, α = β = γ ≠ 90°

Value & Market

Price Tier Moderate ($50-500/ct)

About Binghamite

ビンガムアイトはアメリカのミネソタ州でのみ産出する、稀少な金線光(シルクのような光沢)を持つケイ化クロシドライト(青色アスベスト)とゲータイトの共生変種です。タイガーアイに似た光沢を持ちながら赤褐色がかった色調が特徴で、地域限定の稀少産地と独特の光学効果からコレクターに人気があります。

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Frequently Asked Questions

What is Binghamite?
ビンガムアイトはアメリカのミネソタ州でのみ産出する、稀少な金線光(シルクのような光沢)を持つケイ化クロシドライト(青色アスベスト)とゲータイトの共生変種です。タイガーアイに似た光沢を持ちながら赤褐色がかった色調が特徴で、地域限定の稀少産地と独特の光学効果からコレクターに人気があります。
What is the hardness of Binghamite?
Binghamite has a Mohs hardness of 6.5 to 7.0, making it moderate for use in jewelry.
What color is Binghamite?
Binghamite is primarily Various.
How much does Binghamite cost?
Binghamite falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Binghamite?
Binghamite belongs to the Trigonal crystal system.

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