Stone mosaic effect

I've decided I want my mask to have a stone mosaic effect - either jade or turquoise*.  How do you get a mosaic effect with paper mache?  Well, it turns out this is quite simple.  You get a hole punch and remove the little paper circles that are in its collection tray, then you glue them all over the surface of the thing you want mosaicked.

Fundamentally, this is a lazy little work-around that prevents me from having to tackle the irritating task of smoothing the paper mache surface so it resembles stone.

*This really depends on how the paint effect works out.  I'll be shooting for jade, but who knows?  I've never done a jade effect before.