Germanite is a rare copper-germanium sulfide mineral typically found in massive form within complex polymetallic ore deposits. It is best identified by its distinctive reddish-brown to grayish-pink metallic luster and its association with other sulfides in Tsumeb-style deposits.

Hardness

Mohs

Luster

Metallic

Streak

Black

Transparency

Opaque

mineralrare

Germanite

Hardness: 4
Luster: Metallic
Streak: Black
Transparency: Opaque

Is this germanite?

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 germanite with a known reference. Germanite sits at Mohs 4, softer than the next harder reference, harder than the previous one.
2
Check the streak
Drag the specimen across an unglazed porcelain plate. Germanite leaves a black streak.
3
Read the luster
Hold the specimen under a strong light. Germanite typically shows a metallic luster.
4
Match the color range
Compare against the expected color range: reddish-brown, grayish-pink.
5
Look at form & habit
Crystal system: cubic. Typical habit: massive.

Often confused with

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

mineral

Bornite

Mohs 3

How to tell apart: Germanite is noticeably harder (Mohs 4 vs. 3); streak differs, so Germanite leaves black, Bornite leaves greyish black.

Compare →

Often found alongside germanite

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

All properties

Chemical formula: Cu₂₆Ge₄Fe₄S₃₂
Mohs hardness: 4
Density: 4.43 g/cm³
Colors: Reddish-brown Grayish-pink
Streak: Black
Luster: Metallic
Transparency: Opaque
Crystal system: Cubic
Crystal habit: Massive
Cleavage: None
Rarity: Rare
Uses: Collector, Ore of Germanium
Host rock: Hydrothermal Polymetallic Deposits
Typical price: $50-500 depending on specimen size and quality

Where rockhounds find germanite

Classic worldwide localities

Tsumeb Mine, Namibia
Mpanda, Tanzania
Kidd Creek Mine, Canada

Field-hunting tip

Look in hydrothermal polymetallic deposits country, the host setting where germanite typically forms. If you start seeing tennantite, bornite, galena in float, you are in the right ground. Field specimens usually show a massive habit, so train your eye for that shape before scanning the outcrop.

Common questions

How do you identify germanite?+

Mohs hardness is 4. It typically shows a metallic luster. The streak is black. Common colors include reddish-brown, grayish-pink.

Where is germanite found?+

Notable localities include Tsumeb Mine, Namibia; Mpanda, Tanzania; Kidd Creek Mine, Canada.

How much is germanite worth?+

Typical asking prices fall in the range of $50-500 depending on specimen size and quality. Quality, size, and provenance can move individual specimens well outside that range.

Is germanite safe to handle?+

It contains toxic constituents. Contains copper, germanium, iron, and sulfur; handle with care and wash hands thoroughly after handling. Avoid dust inhalation. Handle with care, avoid grinding or breathing dust, and store separately.

What rocks look like germanite?+

Germanite is most often confused with Bornite. A quick hardness test and a streak check separate the look-alikes faster than color alone.

What minerals are found with germanite?+

Germanite commonly co-occurs with Tennantite, Bornite, Galena, Sphalerite. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does germanite form in?+

Germanite typically forms in hydrothermal polymetallic deposits. Working float back to the host body is the standard way to chase a fresh occurrence.

What is germanite used for?+

Germanite is used in collector, ore of germanium.

Find germanite on the map

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