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.
Is this itoite?
5-step field checkRun through these checks against the specimen in your hand. The more boxes tick, the more confident the ID.
- 1Test the hardnessTry to scratch itoite with a known reference. Itoite sits at Mohs 2.5, softer than the next harder reference, harder than the previous one.
- 2Check the streakDrag the specimen across an unglazed porcelain plate. Streak: white.
- 3Read the lusterHold the specimen under a strong light. Luster: silky.
- 4Match the color rangeCompare against the expected color range: silky white.
- 5Look at form & habitCrystal 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(SO₄)₂(OH)₂
- Mohs hardness
- 2.5
- Density
- 6.67 g/cm³
- Colors
- Silky white
- Streak
- White
- Luster
- Silky
- Transparency
- Transparent to translucent
- Crystal system
- Orthorhombic
- Crystal habit
- Tabular crystals, thin plates, aggregates
- Cleavage
- Distinct on {001}
- Rarity
- Rare
- Uses
- Collector
- Host rock
- Very rare, in an oxidized zone of a polymetallic germanium-bearing sulfide deposit, as an alteration product of fleischerite, perhaps produced by grinding for X-ray analysis
Where rockhounds find itoite
Classic worldwide localities
- Tsumeb, Namibia
Field-hunting tip
Where it forms: Very rare, in an oxidized zone of a polymetallic germanium-bearing sulfide deposit, as an alteration product of fleischerite, perhaps produced by grinding for X-ray analysis. If you start seeing fleischerite, mimetite, cerussite in float, you are in the right ground. Typical habit: tabular crystals, thin plates, aggregates. Train your eye for that shape before scanning the outcrop.
Common questions
How do you identify itoite?+
Where is itoite found?+
Is itoite safe to handle?+
What rocks look like itoite?+
What minerals are found with itoite?+
What kind of rock does itoite form in?+
What is itoite used for?+
Find itoite on the map
RockHoundR shows mapped rockhounding spots, access rules, and lets you log every find.
