Nakauriite is a supergene little-described mineral of the sulfate class.
You can see nacauriite stone for sale and buy it in the Minerals of Russia online store.
Physical properties of Nakauriite
Formula: Cu8(SO4)4(CO3)(OH)6 · 48H2O, may contain minor Mg, Ni.
Colour: Translucent blue
Specific Gravity: 2.39
Crystal System: Orthorhombic