Rokühnite
A variety of Minerals
What is Rokühnite?
Iron(II) chloride, also known as ferrous chloride, is the chemical compound of formula FeCl2. It is a paramagnetic solid with a high melting point. The compound is white, but typical samples are often off-white. FeCl2 crystallizes from water as the greenish tetrahydrate, which is the form that is most commonly encountered in commerce and the laboratory. There is also a dihydrate. The compound is highly soluble in water, giving pale green solutions.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Rokühnite 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.
Rokühnite Localities Map
See where Rokühnite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Colourless (transmitted light), light green
- Density
- 2.35 g/cm³
Chemical Properties
- Chemical Formula
- FeCl2 · 2H2O
- Elements
- Cl, Fe, H, O
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Rokühnite FAQs
How do I identify Rokühnite?
Rokühnite can be identified by its Colourless (transmitted light) color. Look for these key characteristics when examining specimens.
What color is Rokühnite?
Rokühnite typically appears in Colourless (transmitted light), light green. Color can vary depending on impurities and formation conditions.
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