Cyanotrichite

Qinlong Mine in China

Length = 8.9 cm
Width = 7.0 cm
Height = 6.0 cm
Weight = 380 grams
Rating = 7.3/10

I bought this rock at an online auction. It's a pretty rare version of oxidized copper.
It almost looks like it has hairs, which definitely makes it one of the more interesting rocks in my collection.