Simpsonite

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Physical & Optical Properties

Mohs Hardness 7,0 – 7,5
Specific Gravity 5,9 – 7,3
Refractive Index 1,994 – 2,04
Crystal System Trigonal
Cleavage Indistinct
Fracture Conchoidal
Color various
Birefringence 0,046
Pleochroism Nil

Mohs Hardness

Mohs Hardness: 7,0 – 7,5
1 Soft10 Hard

Crystal System

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

Value & Market

Price Tier Moderate ($50-500/ct)

About Simpsonite

La simpsonita es un mineral de óxido de aluminio y tantalio extremadamente raro que forma cristales hexagonales incoloros a amarillentos. Es una especie exclusivamente coleccionable, conocida en muy pocas localidades del mundo. Se encuentra en pegmatitas ricas en tantalio, principalmente en Australia occidental y Mozambique. Su nombre honra al geólogo australiano Edward Sidney Simpson. Los cristales bien formados son muy escasos y de gran interés mineralógico.

Jewelry Use

Durability 7/10

Suitable for daily wear

Science FYI Family

Frequently Asked Questions

What is Simpsonite?
La simpsonita es un mineral de óxido de aluminio y tantalio extremadamente raro que forma cristales hexagonales incoloros a amarillentos. Es una especie exclusivamente coleccionable, conocida en muy pocas localidades del mundo. Se encuentra en pegmatitas ricas en tantalio, principalmente en Australi
What is the hardness of Simpsonite?
Simpsonite has a Mohs hardness of 7.0 to 7.5, making it excellent for use in jewelry.
What color is Simpsonite?
Simpsonite is primarily Various.
How much does Simpsonite cost?
Simpsonite falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Simpsonite?
Simpsonite belongs to the Trigonal crystal system.

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