serpentine

I have an idea for creating serpentine stone in crafting:  vines + diorite would be white serpentine, + granite would be red serpentine, etc.  It could also have a polished version that could make some really pretty architecture.  In addition, It would be really neat if we could chisel granite, diorite and serpentine stones into pillars or other forms.  I'm really into the architecture things and am sure others are as well.