Itoite is a rare lead germanium mineral primarily found in the oxidized zones of lead-rich ore deposits. It typically forms delicate tabular crystals or thin plates that are often confused with more common lead carbonates like cerussite. Collectors prize it for its association with the unique mineralogy of the Tsumeb mine in Namibia.

Hardness

2.5

Mohs

Luster

Adamantine

Streak

White

Transparency

Transparent

mineralrare

Itoite

Hardness: 2.5
Luster: Adamantine
Streak: White
Transparency: Transparent

No image

Is this itoite?

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 itoite with a known reference. Itoite sits at Mohs 2.5 — softer than the next harder reference, harder than the previous one.
2
Check the streak
Drag the specimen across an unglazed porcelain plate. Itoite leaves a white streak.
3
Read the luster
Hold the specimen under a strong light. Itoite typically shows a adamantine luster.
4
Match the color range
Compare against the expected color range: white, colorless, yellow.
5
Look at form & habit
Crystal system: orthorhombic. Typical habit: tabular crystals, thin plates, aggregates.

Often confused with

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

Often found alongside itoite

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

All properties

Chemical formula: Pb₃GeO₂(OH)₄
Mohs hardness: 2.5
Density: 6.35 g/cm³
Colors: White Colorless Yellow
Streak: White
Luster: Adamantine
Transparency: Transparent
Crystal system: Orthorhombic
Crystal habit: Tabular Crystals, Thin Plates, Aggregates
Cleavage: Distinct On {001}
Rarity: Rare
Uses: Collector
Host rock: Oxidized Hydrothermal Lead-germanium Ore Deposits
Typical price: $100-500 for small thumbnail specimens

Where rockhounds find itoite

Classic worldwide localities

Tsumeb Mine, Namibia

Field-hunting tip

Look in oxidized hydrothermal lead-germanium ore deposits country — that is the host setting where itoite typically forms. If you start seeing tsumebite, cerussite, anglesite in float, you are in the right ground. Field specimens usually show a tabular crystals, thin plates, aggregates habit, so train your eye for that shape before scanning the outcrop.

Common questions

How do you identify itoite?+

Mohs hardness is 2.5. It typically shows a adamantine luster. The streak is white. Common colors include white, colorless, yellow.

Where is itoite found?+

Notable localities include Tsumeb Mine, Namibia.

How much is itoite worth?+

Typical asking prices fall in the range of $100-500 for small thumbnail specimens. Quality, size, and provenance can move individual specimens well outside that range.

Is itoite safe to handle?+

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

What rocks look like itoite?+

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

What minerals are found with itoite?+

Itoite commonly co-occurs with Tsumebite, Cerussite, Anglesite, Galena. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does itoite form in?+

Itoite typically forms in oxidized hydrothermal lead-germanium ore deposits. Working float back to the host body is the standard way to chase a fresh occurrence.

What is itoite used for?+

Itoite is used in collector.

Find itoite on the map

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