Sinhalite

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Physical & Optical Properties

Mohs Hardness 6,0 – 7,0
Specific Gravity 3,46 – 3,5
Refractive Index 1,665 – 1,712
Crystal System Orthorhombic
Luster Vitreous
Cleavage None
Fracture Conchoidal
Color various
Birefringence 0,036
Dispersion 0,018
Pleochroism Trichroism: green - light brown - dark brown

Mohs Hardness

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

A sinhalite é um raro mineral de borato de magnésio, ferro e alumínio identificado como nova espécie em 1952, proveniente do Sri Lanka (nome do qual deriva). Exibe cores que variam do amarelo pálido ao castanho avermelhado intenso, com forte pleocroísmo e lustre vítreo. Por muito tempo confundida com o crisoberilo ou a peridota, é hoje reconhecida como uma gema de colecionador distinta, com os melhores exemplares provenientes do Sri Lanka e da Birmânia.

Science FYI Family

Frequently Asked Questions

What is Sinhalite?
A sinhalite é um raro mineral de borato de magnésio, ferro e alumínio identificado como nova espécie em 1952, proveniente do Sri Lanka (nome do qual deriva). Exibe cores que variam do amarelo pálido ao castanho avermelhado intenso, com forte pleocroísmo e lustre vítreo. Por muito tempo confundida co
What is the hardness of Sinhalite?
Sinhalite has a Mohs hardness of 6.0 to 7.0, making it moderate for use in jewelry.
What color is Sinhalite?
Sinhalite is primarily Various.
How much does Sinhalite cost?
Sinhalite falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Sinhalite?
Sinhalite belongs to the Orthorhombic crystal system.

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