Hiddenite

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Physical & Optical Properties

Mohs Hardness 6,0 – 7,0
Specific Gravity 3,15 – 3,21
Refractive Index 1,657 – 1,681
Crystal System Monoclinic
Luster Vitreous
Cleavage Perfect
Fracture Uneven
Color various
Birefringence 0,014
Dispersion 0,017
Pleochroism Distinct trichroism: yellow green - green - blue green

Mohs Hardness

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

A hiddenite é a variedade verde do espodumeno, com cristais que variam do verde-amarelado ao verde intenso, coloridos pelo crómio. O nome homenageia W.E. Hidden, que a descobriu em Hidden Mine, Carolina do Norte, EUA — ainda a principal localidade conhecida. As variedades mais escuras de hiddenite são extremamente raras e valorizadas. Embora esteticamente bela, a clivagem perfeita do espodumeno torna a hiddenite difícil de lapidar. Os exemplares finos rivalizam com a esmeralda em apelo.

Science FYI Family

Frequently Asked Questions

What is Hiddenite?
A hiddenite é a variedade verde do espodumeno, com cristais que variam do verde-amarelado ao verde intenso, coloridos pelo crómio. O nome homenageia W.E. Hidden, que a descobriu em Hidden Mine, Carolina do Norte, EUA — ainda a principal localidade conhecida. As variedades mais escuras de hiddenite s
What is the hardness of Hiddenite?
Hiddenite has a Mohs hardness of 6.0 to 7.0, making it moderate for use in jewelry.
What color is Hiddenite?
Hiddenite is primarily Various.
How much does Hiddenite cost?
Hiddenite falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Hiddenite?
Hiddenite belongs to the Monoclinic crystal system.

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