Dantopaite is a rare silver bismuth selenide discovered in the Dantopa deposit of Argentina. It typically occurs as small grains associated with other selenide minerals in hydrothermal environments, requiring microscopic identification techniques to confirm.

Hardness

3.5

Mohs

Luster

Metallic

Transparency

Opaque

mineralrare

Dantopaite

Hardness: 3.5
Luster: Metallic
Transparency: Opaque

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Is this dantopaite?

4-step field check

Run through these checks against the specimen in your hand. The more boxes tick, the more confident the ID.

1
Test the hardness
Try to scratch dantopaite with a known reference. Dantopaite sits at Mohs 3.5, softer than the next harder reference, harder than the previous one.
2
Read the luster
Hold the specimen under a strong light. Luster: metallic.
3
Match the color range
Compare against the expected color range: dark gray, black.
4
Look at form & habit
Crystal system: monoclinic. Typical habit: anhedral grains, irregular masses.

Often confused with

Dantopaite vs. its common look-alikes, and how to tell them apart in the field.

How to tell apart: Dantopaite is noticeably harder (Mohs 3.5 vs. 2-2.5).

How to tell apart: Dantopaite is noticeably harder (Mohs 3.5 vs. 2-2.5).

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Often found alongside dantopaite

Minerals reported to co-occur with dantopaite. Spotting these in float or country rock is a strong cue you are in the right ground.

All properties

Chemical formula: Ag₅Bi₁₃S₂₂
Mohs hardness: 3.5
Density: 6.74 g/cm³
Colors: Dark gray Black
Luster: Metallic
Transparency: Opaque
Crystal system: Monoclinic
Crystal habit: Anhedral grains, irregular masses
Cleavage: None
Rarity: Rare
Uses: Collector, Scientific research
Host rock: From mineralized (metallic sulfosalts) hydrothermal quartz veins

Where rockhounds find dantopaite

Classic worldwide localities

Erzwies mining district, Hohe Tauern region, west of the Gasteinertal, province of Salzburg, Austria

Field-hunting tip

Where it forms: From mineralized (metallic sulfosalts) hydrothermal quartz veins. If you start seeing bismuthinite, krupkaite, pavonite in float, you are in the right ground. Typical habit: anhedral grains, irregular masses. Train your eye for that shape before scanning the outcrop.

Common questions

How do you identify dantopaite?+

Mohs hardness is 3.5. Luster: metallic. Common colors include dark gray, black.

Where is dantopaite found?+

Notable localities include Erzwies mining district, Hohe Tauern region, west of the Gasteinertal, province of Salzburg, Austria.

Is dantopaite safe to handle?+

Contains selenium and silver; handle with caution. Avoid creating dust and wash hands thoroughly after handling to prevent ingestion of toxic heavy metals.

What rocks look like dantopaite?+

Dantopaite is most often confused with Clausthalite, Aikinite, Bismuthinite. A quick hardness test and a streak check separate the look-alikes faster than color alone.

What minerals are found with dantopaite?+

Dantopaite commonly co-occurs with Bismuthinite, Krupkaite, Pavonite, Benjaminite, Gustavite, Heyrovskyite. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does dantopaite form in?+

Where it forms: From mineralized (metallic sulfosalts) hydrothermal quartz veins. Working float back to the host body is the standard way to chase a fresh occurrence.

What is dantopaite used for?+

Dantopaite is used in collector, scientific research.

Find dantopaite on the map

RockHoundR shows mapped rockhounding spots, access rules, and lets you log every find.