Renierite is a rare germanium-bearing sulfide mineral that typically occurs as massive or granular intergrowths within complex sulfide ore bodies. Collectors primarily seek it for its distinct bronze metallic luster and its association with the classic Tsumeb mining district.

Hardness

4.5

Mohs

Luster

Metallic

Streak

Black

Transparency

Opaque

mineralrareGermanite Group family

Renierite

Hardness: 4.5
Luster: Metallic
Streak: Black
Transparency: Opaque

Is this renierite?

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 renierite with a known reference. Renierite sits at Mohs 4.5 — softer than the next harder reference, harder than the previous one.
2
Check the streak
Drag the specimen across an unglazed porcelain plate. Renierite leaves a black streak.
3
Read the luster
Hold the specimen under a strong light. Renierite typically shows a metallic luster.
4
Match the color range
Compare against the expected color range: bronze, reddish-brown.
5
Look at form & habit
Crystal system: tetragonal. Typical habit: massive, granular, or interstitial.

Often confused with

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

How to tell apart: Renierite is noticeably harder (Mohs 4.5 vs. 3); streak differs — Renierite leaves black, Bornite leaves greyish black.

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Often found alongside renierite

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

All properties

Chemical formula: (Cu,Zn,Ge,As,Fe,S)₁₆
Mohs hardness: 4.5
Density: 4.35 g/cm³
Colors: Bronze Reddish-brown
Streak: Black
Luster: Metallic
Transparency: Opaque
Crystal system: Tetragonal
Crystal habit: Massive, Granular, Or Interstitial
Cleavage: None
Rarity: Rare
Uses: Collector, Research
Host rock: Hydrothermal Polymetallic Sulfide Deposits
Typical price: $50-500 depending on specimen size and quality

Where rockhounds find renierite

Classic worldwide localities

Tsumeb Mine, Namibia
Kipushi Mine, DR Congo

Field-hunting tip

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

Common questions

How do you identify renierite?+

Mohs hardness is 4.5. It typically shows a metallic luster. The streak is black. Common colors include bronze, reddish-brown.

Where is renierite found?+

Notable localities include Tsumeb Mine, Namibia; Kipushi Mine, DR Congo.

How much is renierite 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 renierite safe to handle?+

It contains toxic constituents. Contains arsenic and copper; wash hands thoroughly after handling and avoid inhaling dust if crushed. Handle with care, avoid grinding or breathing dust, and store separately.

What rocks look like renierite?+

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

What minerals are found with renierite?+

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

What kind of rock does renierite form in?+

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

What is renierite used for?+

Renierite is used in collector, research.

Find renierite on the map

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