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

Mohs Hardness: 6,0 – 7,0
1 Soft10 Hard

Crystal System

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

Value & Market

Price Tier Moderate ($50-500/ct)

About Sinhalite

Sinhalite is a rare magnesium-iron aluminum borate mineral first identified as a new species in 1952 from Sri Lanka (formerly Serendib or Sinhala, from which it takes its name), displaying pale yellow to dark brown hues with a vitreous luster. For decades before its identification, sinhalite was mistaken for brown peridot, making its recognition a significant gemological milestone. Fine faceted stones from Sri Lanka and Burma are sought by collectors of rare gems.

Jewelry Use

Durability 5/10

Science FYI Family

Frequently Asked Questions

What is Sinhalite?
Sinhalite is a rare magnesium-iron aluminum borate mineral first identified as a new species in 1952 from Sri Lanka (formerly Serendib or Sinhala, from which it takes its name), displaying pale yellow to dark brown hues with a vitreous luster. For decades before its identification, sinhalite was mis
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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