Crystopedia
IMA mineral species

Bartelkeite

🪶 Soft, Scratches Easily

PbFeGe(Ge₂O₇)(OH)₂·H₂O

Germanate mineral.

GreenWhite & Clear

Properties

⛏ Mohs hardness4
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💅🪙🍶🔪💎

A steel knife scratches it, it won't scratch glass.

🔷 Monoclinic✏️ streak white
Chemical formulaPbFeGe(Ge₂O₇)(OH)₂·H₂O
ElementsPb, Fe, Ge, O, H
Crystal systemMonoclinic
Mohs hardness4
Density—
Streakwhite
Color—
IMA symbolBtk
Nickel–Strunz class9.JO.10

“—” means no reliable value in Wikidata yet. Check Mindat for full data.

Care & Handling

  • 🪶 Soft, Scratches Easily Mohs 4: softer than a steel knife, so it scratches easily. Store it apart from harder stones.

🌍 Where it's found

Type locality (where it was first described): Tsumeb Mine, Namibia

  • Type locality
  • Notable source / deposit
  • Country of origin

Marker positions are approximate (region or locality level). Type localities from Wikidata; notable sources curated by Crystopedia.

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