Thalhammerite is an extremely rare palladium-silver telluride mineral. It typically occurs as microscopic grains within massive sulfide ore deposits, making it a target for specialized mineral collectors focused on PGM species.

Hardness

3.5

Mohs

Luster

Metallic

Streak

Black

Transparency

Opaque

mineralrare

Thalhammerite

Hardness: 3.5
Luster: Metallic
Streak: Black
Transparency: Opaque

No image

Is this thalhammerite?

5-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 thalhammerite with a known reference. Thalhammerite sits at Mohs 3.5, softer than the next harder reference, harder than the previous one.
2
Check the streak
Drag the specimen across an unglazed porcelain plate. Thalhammerite leaves a black streak.
3
Read the luster
Hold the specimen under a strong light. Thalhammerite typically shows a metallic luster.
4
Match the color range
Compare against the expected color range: white, pale yellow.
5
Look at form & habit
Crystal system: tetragonal. Typical habit: grains.

Often confused with

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

mineral

Telluropalladinite

Mohs 3.5-4

How to tell apart: Streak differs, so Thalhammerite leaves black, Telluropalladinite leaves gray.

How to tell apart: Thalhammerite is noticeably harder (Mohs 3.5 vs. 2.5).

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Often found alongside thalhammerite

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

All properties

Chemical formula: Pd₉Ag₂Bi₂S₄
Mohs hardness: 3.5
Density: 9.56 g/cm³
Colors: White Pale Yellow
Streak: Black
Luster: Metallic
Transparency: Opaque
Crystal system: Tetragonal
Crystal habit: Grains
Cleavage: None
Rarity: Rare
Uses: Collector
Host rock: Hydrothermal Platinum-group Element Deposits

Where rockhounds find thalhammerite

Classic worldwide localities

Thalhammer, Germany
Stillwater Complex, USA
Norilsk, Russia

Field-hunting tip

Look in hydrothermal platinum-group element deposits country, the host setting where thalhammerite typically forms. If you start seeing chalcopyrite, pentlandite, bornite in float, you are in the right ground. Field specimens usually show a grains habit, so train your eye for that shape before scanning the outcrop.

Common questions

How do you identify thalhammerite?+

Mohs hardness is 3.5. It typically shows a metallic luster. The streak is black. Common colors include white, pale yellow.

Where is thalhammerite found?+

Notable localities include Thalhammer, Germany; Stillwater Complex, USA; Norilsk, Russia.

Is thalhammerite safe to handle?+

It contains toxic constituents. Contains bismuth, which is toxic if ingested or inhaled as dust. Wash hands thoroughly after handling and avoid creating dust. Handle with care, avoid grinding or breathing dust, and store separately.

What rocks look like thalhammerite?+

Thalhammerite is most often confused with Telluropalladinite, Kotulskite. A quick hardness test and a streak check separate the look-alikes faster than color alone.

What minerals are found with thalhammerite?+

Thalhammerite commonly co-occurs with Chalcopyrite, Pentlandite, Bornite. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does thalhammerite form in?+

Thalhammerite typically forms in hydrothermal platinum-group element deposits. Working float back to the host body is the standard way to chase a fresh occurrence.

What is thalhammerite used for?+

Thalhammerite is used in collector.

Find thalhammerite on the map

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