Uytenbogaardtite

A variety of Minerals

Uytenbogaardtite specimen

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.

Applies to all rocks & minerals.

Uytenbogaardtite Localities Map

See where Uytenbogaardtite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.

Map preview
North ZoneCentral RidgeSouth Basin

Interactive map layers and collecting notes are available in the app.

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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