Knebelite
A variety of Minerals
What is Knebelite?
Knebelite is a manganese variety of the fayalite-tephroite series with formula (Fe,Mn)2SiO4. It forms dark green orthorhombic crystals. It is reported from a variety of locations in Sweden as well as South Africa, Russia, British Columbia, New Hampshire, and Rhode Island.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Knebelite 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.
Applies to all rocks & minerals.
Quick Facts
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