Geocronite
A variety of Minerals
What is Geocronite?
Geocronite is a mineral, a mixed sulfosalt containing lead, antimony, and arsenic with a formula of Pb14(Sb, As)6S23. Geocronite is the antimony-rich endmember of a solid solution series. The arsenic-rich endmember is named jordanite. It occurs as grey, black, to silvery white monoclinic crystals. It is found in hydrothermal veins usually associated with other similar minerals, particularly the sulfides of iron and copper. The mineral has been found in Spain, Ireland and Sweden where it was first identified in 1839.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Geocronite 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.
Geocronite Localities Map
See where Geocronite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
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Quick Facts
Physical Properties
- Color
- Light lead gray to grayish
- Hardness (Mohs)
- 2.5 - 3
- Density
- 6.46 g/cm³
- Streak
- Light leadgray to grayish blue
Chemical Properties
- Chemical Formula
- Pb14(Sb,As)6S23
- Elements
- As, Pb, S, Sb
Also Known As
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Geocronite FAQs
How do I identify Geocronite?
Geocronite can be identified by its hardness of 2.5 - 3 on the Mohs scale, Light lead gray to grayish color. Look for these key characteristics when examining specimens.
What color is Geocronite?
Geocronite typically appears in Light lead gray to grayish. Color can vary depending on impurities and formation conditions.
How hard is Geocronite?
Geocronite has a hardness of 2.5 - 3 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
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