IMA mineral species

Jaskólskiite

🪶 Soft, Scratches Easily

CuₓPb₂₊ₓ(Sb,Bi)₂₋ₓS₅ (x~0.2)

Sulfosalt mineral.

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

Properties

⛏ Mohs hardness4
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💅🪙🍶🔪💎

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

Chemical formulaCuₓPb₂₊ₓ(Sb,Bi)₂₋ₓS₅ (x~0.2)
ElementsCu, Pb, Sb, Bi, S
Crystal systemOrthorhombic
Mohs hardness4
Density—
Streak—
Color—
IMA symbolJks
Nickel–Strunz class2.HB.05c

“—” 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.