Norbergite

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Physical & Optical Properties

Mohs Hardness 6.0 – 6.5
Specific Gravity 3.177
Refractive Index 1.563 – 1.593
Crystal System Orthorhombic
Luster Vitreous,Resinous
Fracture Uneven,Sub-Conchoidal
Color various
Pleochroism Pale yellow - very pale yellow - colorless

Mohs Hardness

Mohs Hardness: 6.0 – 6.5
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 Norbergite

Norbergite is a magnesium silicate fluoride hydroxide mineral and the simplest member of the humite group, forming colorless, pale yellow, or orange tabular crystals with a vitreous to resinous luster in contact metamorphic dolomitic marbles. Named after the Norberg iron ore district in Sweden where it was first described, it also occurs in New Jersey (USA), Italy, and Japan. Transparent faceted norbergite is among the rarest collector gems in the humite mineral group.

Jewelry Use

Durability 5/10

Science FYI Family

Frequently Asked Questions

What is Norbergite?
Norbergite is a magnesium silicate fluoride hydroxide mineral and the simplest member of the humite group, forming colorless, pale yellow, or orange tabular crystals with a vitreous to resinous luster in contact metamorphic dolomitic marbles. Named after the Norberg iron ore district in Sweden where
What is the hardness of Norbergite?
Norbergite has a Mohs hardness of 6.0 to 6.5, making it moderate for use in jewelry.
What color is Norbergite?
Norbergite is primarily Various.
How much does Norbergite cost?
Norbergite falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Norbergite?
Norbergite belongs to the Orthorhombic crystal system.

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