Cobaltite

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Physical & Optical Properties

Mohs Hardness 5,5
Specific Gravity 6,3
Crystal System Orthorhombic
Luster Metallic
Cleavage Perfect
Fracture Uneven
Color various
Pleochroism Very weak, on grain boundaries

Mohs Hardness

Mohs Hardness: 5,5
1 Soft10 Hard

Crystal System

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

Value & Market

Price Tier Budget (< $50/ct)

About Cobaltite

Cobaltite is a cobalt arsenic sulfide mineral forming bright silver to grayish-white cubic or pseudo-cubic crystals with a metallic luster, found in high-temperature hydrothermal veins and metamorphic rocks in Sweden, Canada, and Democratic Republic of Congo. It is an important cobalt ore mineral and occasionally forms attractive cube crystals used as display specimens. Its mirror-bright, silver metallic sheen on well-formed crystals makes it visually striking.

Jewelry Use

Durability 4/10

Science FYI Family

Frequently Asked Questions

What is Cobaltite?
Cobaltite is a cobalt arsenic sulfide mineral forming bright silver to grayish-white cubic or pseudo-cubic crystals with a metallic luster, found in high-temperature hydrothermal veins and metamorphic rocks in Sweden, Canada, and Democratic Republic of Congo. It is an important cobalt ore mineral an
What is the hardness of Cobaltite?
Cobaltite has a Mohs hardness of 5.5, making it moderate for use in jewelry.
What color is Cobaltite?
Cobaltite is primarily Various.
How much does Cobaltite cost?
Cobaltite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Cobaltite?
Cobaltite belongs to the Orthorhombic crystal system.

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