Valleriite
![](/Images/godic/202502/19/Cubanite-Maucherite-Valleriite-1999224209.jpg")
Valleriite is an uncommon sulfide mineral (hydroxysulfide) of iron and copper with formula: 4(Fe,Cu)S·3(Mg,Al)(OH)2 or (Fe,Cu)4(Mg,Al)3S4(OH,O)6. It is an opaque, soft, bronze-yellow to brown mineral which occurs as nodules or encrustations.