Ettringite

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Physical & Optical Properties

Category Collector Gems
Mohs Hardness 2,0 – 2,5
Specific Gravity 1,77
Refractive Index 1,47 – 1,491
Crystal System Hexagonal
Cleavage Perfect
Color various
Birefringence 0,021

Mohs Hardness

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

Crystal System

a a c Hexagonal a = b ≠ c, α = β = 90°, γ = 120°

Value & Market

Price Tier Budget (< $50/ct)

Where to Buy Ettringite

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About Ettringite

La ettringita es un raro mineral de sulfoaluminato de calcio que forma llamativos cristales prismáticos alargados de color amarillo brillante a incoloro en cavidades de minerales de zinc metamorfoseados en contacto. Su lugar de tipo es Ettringen, Alemania, y también se encuentra en Franklin, Nueva Jersey. Los cristales finos son rarezas de coleccionista muy apreciadas, aunque el mineral es demasiado frágil y soluble para cualquier uso gemológico práctico.

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Frequently Asked Questions

What is Ettringite?
La ettringita es un raro mineral de sulfoaluminato de calcio que forma llamativos cristales prismáticos alargados de color amarillo brillante a incoloro en cavidades de minerales de zinc metamorfoseados en contacto. Su lugar de tipo es Ettringen, Alemania, y también se encuentra en Franklin, Nueva J
What is the hardness of Ettringite?
Ettringite has a Mohs hardness of 2.0 to 2.5, making it relatively soft for use in jewelry.
What color is Ettringite?
Ettringite is primarily Various.
How much does Ettringite cost?
Ettringite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Ettringite?
Ettringite belongs to the Hexagonal crystal system.