IMA mineral species

Fornacite

CuPb₂(CrO₄)(AsO₄)(OH)

Chromate-arsenate mineral.

Green

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

Properties

Chemical formulaCuPb₂(CrO₄)(AsO₄)(OH)
ElementsCu, Pb, Cr, O, As, H
Crystal systemMonoclinic
Mohs hardness2.5
Density6.27 g/cm³
Streakolive
Color—
IMA symbolFor
Nickel–Strunz class7.FC.10

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

🌍 Where it's found

Type locality (where it was first described): Reneville, Republic of the Congo