IMA mineral species

Giessenite

🪶 Soft, Scratches Easily

(Cu,Fe)₂Pb₂₆.₄(Bi,Sb)₁₉.₆S₅₇

Sulfosalt mineral.

Giessenite specimen — Giessenite.jpg · Wikimedia Commons (see file page for author & license)

Properties

⛏ Mohs hardness2.5

12345678910

💅🪙🍶🔪💎

Scratches with a fingernail.

🔷 Monoclinic

Chemical formula	(Cu,Fe)₂Pb₂₆.₄(Bi,Sb)₁₉.₆S₅₇
Elements	Cu, Fe, Pb, Bi, Sb, S
Crystal system	Monoclinic
Mohs hardness	2.5
Density	—
Streak	—
Color	—
IMA symbol	Gie
Nickel–Strunz class	2.HB.10b

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

Care & Handling

🪶 Soft, Scratches Easily Mohs 2.5: softer than a steel knife, so it scratches easily. Store it apart from harder stones.

Learn more

Giessenite on Mindat.org
Wikidata item Q3764033 (source of this page's data – you can correct it there)