Uytenbogaardtite
A variety of Minerals

What is Uytenbogaardtite?
The mineral uytenbogaardtite, Ag3AuS2, is a soft, greyish white sulfide mineral, occurring in hydrothermal Au-Ag-quartz veins. It occurs as tiny crystals, visible only with a microscope. It has a metallic luster and a hardness on the Mohs scale of 2 (gypsum). It forms, together with petzite (Ag3AuTe2) and fischesserite (Ag3AuSe2) the uytenbogaardtite group. The type locality is Tambang Sawah, Bengkulu district, Sumatra island, Indonesia. It is named after the Dutch mineralogist Willem Uytenbogaardt (1918–2012), Professor of Geology, Technical University, Delft, The Netherlands, prominent ore microscopist.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Uytenbogaardtite 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.
Uytenbogaardtite Localities Map
See where Uytenbogaardtite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Greyish-white
- Hardness (Mohs)
- 2
Chemical Properties
- Chemical Formula
- Ag3AuS2
- Elements
- Ag, Au, S

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Uytenbogaardtite FAQs
How do I identify Uytenbogaardtite?
Uytenbogaardtite can be identified by its hardness of 2 on the Mohs scale, Greyish-white color. Look for these key characteristics when examining specimens.
What color is Uytenbogaardtite?
Uytenbogaardtite typically appears in Greyish-white. Color can vary depending on impurities and formation conditions.
How hard is Uytenbogaardtite?
Uytenbogaardtite has a hardness of 2 on the Mohs scale. This makes it a soft mineral that can be scratched easily.


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