Laurionite
A variety of Matlockite Group
What is Laurionite?
Laurionite (PbCl(OH)) is a lead halide mineral. It forms colorless to white crystals in the orthorhombic crystal system and is dimorphous with paralaurionite, both members of the matlockite group. It was first described in 1887 for an occurrence in the Laurium District, Attica, Greece, and named after the town Laurium. It occurs as an oxidation product in lead ore deposits, and is also produced on lead-bearing slag by reaction with saline solutions. It occurs associated with paralaurionite, penfieldite, fiedlerite, phosgenite, cerussite and anglesite.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Laurionite 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.
Laurionite Localities Map
See where Laurionite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Colourless, white
- Hardness (Mohs)
- 3 - 3.5
- Density
- 6.212 g/cm³
Chemical Properties
- Chemical Formula
- PbCl(OH)
- Elements
- Cl, H, O, Pb
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Laurionite FAQs
How do I identify Laurionite?
Laurionite can be identified by its hardness of 3 - 3.5 on the Mohs scale, Colourless color. Look for these key characteristics when examining specimens.
What color is Laurionite?
Laurionite typically appears in Colourless, white. Color can vary depending on impurities and formation conditions.
How hard is Laurionite?
Laurionite has a hardness of 3 - 3.5 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
