Valleriite
2.24 ct
Trillion Cut
8.20 x 8.20mm Little Chief Mine,
Whitehorse,
Yukon Territory,
Canada.

Valleriite

Is a quite rare sulfide mineral of iron and copper with a long formula:

4(Fe,Cu)S·3(Mg,Al)(OH)2 or (Fe²⁺,Cu)4(Mg, Al)3S4(OH,O)6.-The hardness is very low: H1.5 about.

An other unusual stone for collectors.

y969