Challacolloite
A variety of Minerals
What is Challacolloite?
Challacolloite, KPb2Cl5, is a rare halide mineral. It crystallizes in the monoclinic system (with space group P21/c) and occurs as white fumarolic encrustations on lava. It occurs as intergrowths with cotunnite. It was first described from a finding at the Challacollo Mine, Iquique, Chile and thereafter identified in specimens from the 1855 Mount Vesuvius eruption and from the Kudryavyi volcano in the Kuriles and also from the Satsuma-Iwojima volcano in Japan. It was recognized as a valid mineral species by the IMA (International Mineralogical Association) in 2005. Artificially grown KPb2Cl5 crystals are used for lasers.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Challacolloite 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.
Challacolloite Localities Map
See where Challacolloite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Colourless to white
- Hardness (Mohs)
- 2 - 3
- Density
- 4.77 g/cm³
Chemical Properties
- Chemical Formula
- KPb2Cl5
- Elements
- Cl, K, Pb
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Challacolloite FAQs
How do I identify Challacolloite?
Challacolloite can be identified by its hardness of 2 - 3 on the Mohs scale, Colourless to white color. Look for these key characteristics when examining specimens.
What color is Challacolloite?
Challacolloite typically appears in Colourless to white. Color can vary depending on impurities and formation conditions.
How hard is Challacolloite?
Challacolloite has a hardness of 2 - 3 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
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