Every so often a mineral comes around that causes a slight stir in the lapidary community. One such item is K2 Granite, otherwise known as K2 Jasper. Though the latter isn't accurate as it is a granite and certainly not jasper. The material comes from the Gilget-Baltistan region that borders Pakistan and China. Specifically the K2 mountain which has the second highest elevation in the world next to Everest. It is distinct for it's wonderful blue colored "orbs" that are found in it. That's where the "kerfluffle" begins. It's human nature to assume when something is a little too good to believe that it is. In this case there is still talk that the blue color is a treatment of some kind.
So what's the truth of the matter? It turns out that the blue is azurite (a copper carbonate mineral that forms as copper deteriorates over time) but not as an inclusion so much as a staining. Due to being a staining in the granite itself the normally very soft azurite is effectively fortified and allowed to have the same lapidary properties of the surrounding granite. This makes it a surprisingly easy stone to cut and polish.
If you're in the market for an azurite stained piece of granite to carry around you can find one HERE.