Clinohumite

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Physical & Optical Properties

Mohs Hardness 6.0
Specific Gravity 3.13 – 3.75
Refractive Index 1.623 – 1.728
Crystal System Monoclinic
Luster Vitreous,Resinous
Cleavage Poor
Fracture Sub-Conchoidal
Color various
Birefringence 0.024
Dispersion 0.021
Pleochroism Distinct: brownish-orange - orange to yellow - yellow to colorless

Mohs Hardness

Mohs Hardness: 6.0
1 Soft10 Hard

Crystal System

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

Value & Market

Price Tier Moderate ($50-500/ct)

About Clinohumite

Clinohumite is a magnesium silicate fluoride of the humite group, forming orange to yellow gem crystals in metamorphosed dolomitic limestones and skarns, with the finest transparent gem material coming from Tajikistan and Siberia, Russia. Its warm, deep orange color—unusual for a silicate mineral—and moderate hardness make faceted clinohumite striking collector gems. A rare titaniferous variety from Tanzania displays an unusual golden-orange that rivals hessonite garnet.

Jewelry Use

Durability 5/10

Science FYI Family

Frequently Asked Questions

What is Clinohumite?
Clinohumite is a magnesium silicate fluoride of the humite group, forming orange to yellow gem crystals in metamorphosed dolomitic limestones and skarns, with the finest transparent gem material coming from Tajikistan and Siberia, Russia. Its warm, deep orange color—unusual for a silicate mineral—an
What is the hardness of Clinohumite?
Clinohumite has a Mohs hardness of 6.0, making it moderate for use in jewelry.
What color is Clinohumite?
Clinohumite is primarily Various.
How much does Clinohumite cost?
Clinohumite falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Clinohumite?
Clinohumite belongs to the Monoclinic crystal system.

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