Linnaeite
A variety of Linnaeite Subgroup
What is Linnaeite?
Linnaeite is a cobalt sulfide mineral with the composition CoCo2S4. It was discovered in 1845 in Västmanland, Sweden, and was named to honor Carl Linnaeus (1707–1778). Linnaeite forms a series with polydymite, NiNi2S4. Linnaeite is found in hydrothermal veins with other cobalt and nickel sulfides in many localities around the world.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Linnaeite before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
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Quick Facts
Physical Properties
- Color
- Grey, violet
- Hardness (Mohs)
- 4.5 - 5.5
- Rock tumbling
- Not recommended
- Streak
- Greyish black
Chemical Properties
- Chemical Formula
- Co2+Co3+2S4
- Elements
- Co, S
Also Known As
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Linnaeite FAQs
How do I identify Linnaeite?
Linnaeite can be identified by its hardness of 4.5 - 5.5 on the Mohs scale, Grey color. Look for these key characteristics when examining specimens.
What color is Linnaeite?
Linnaeite typically appears in Grey, violet. Color can vary depending on impurities and formation conditions.
How hard is Linnaeite?
Linnaeite has a hardness of 4.5 - 5.5 on the Mohs scale. This gives it moderate hardness.
