Kratochvílite
A variety of Minerals
What is Kratochvílite?
Kratochvilite is a rare organic mineral formed by combustion of coal or pyritic black shale deposits. It is a hydrocarbon with the formula of either C13H10 or (C6H4)2CH2. It is a polymorph of the aromatic hydrocarbon fluorene. It forms white, yellow to brown crystals in the orthorhombic system which occur often as a druzey encrustation. It has a specific gravity of 1.21 and a Mohs hardness of 1 to 2. It was first described from the Nejedly mine in Bohemia, Czech Republic in 1937.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Kratochvílite 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.
Kratochvílite Localities Map
See where Kratochvílite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Density
- 1.197 g/cm³
Chemical Properties
- Chemical Formula
- C13H10
- Elements
- C, H
Also Known As
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