Kornerupine

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Physical & Optical Properties

Mohs Hardness 6,5
Specific Gravity 3,25 – 3,45
Refractive Index 1,66 – 1,685
Crystal System Orthorhombic
Luster Vitreous
Cleavage Good
Fracture Conchoidal
Color various
Birefringence 0,012
Dispersion 0,018
Pleochroism Strong trichroism is common for green variety: green - yellow - reddish brown

Mohs Hardness

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

Crystal System

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

Value & Market

Price Tier Moderate ($50-500/ct)

About Kornerupine

La kornerupina es un raro borosilicato de magnesio y aluminio que forma cristales prismáticos de color verde a marrón verdoso, a veces con pleocroísmo verde-amarillo o exhibiendo efecto ojo de gato. Nombrada en honor al mineralogista danés Andreas Nikolaus Kornerup, el material de calidad gemológica más fino proviene de Sri Lanka, Madagascar y Kenya. Su color verde reminiscente de la tsavorita y la rareza de los ejemplares de alta calidad la hacen muy apreciada entre los coleccionistas de gemas.

Science FYI Family

Frequently Asked Questions

What is Kornerupine?
La kornerupina es un raro borosilicato de magnesio y aluminio que forma cristales prismáticos de color verde a marrón verdoso, a veces con pleocroísmo verde-amarillo o exhibiendo efecto ojo de gato. Nombrada en honor al mineralogista danés Andreas Nikolaus Kornerup, el material de calidad gemológica
What is the hardness of Kornerupine?
Kornerupine has a Mohs hardness of 6.5, making it moderate for use in jewelry.
What color is Kornerupine?
Kornerupine is primarily Various.
How much does Kornerupine cost?
Kornerupine falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Kornerupine?
Kornerupine belongs to the Orthorhombic crystal system.

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