This is a shiny version of my stainless steel pendant.
The structure of the leaf was photographed, vectorized and extruded to 3d. All this can be done with free software like Gimp (for photos), Inkscape (for vector graphics) and Blender (for 3d modeling).

The veins of a leaf are not unlike to a human bloodstream. We're part of a manifold evolution and all is based on the same protozoon. We're not special or superior and we should remind this more often.
 
Polished brass pendant, manufactured via Shapways 3d printing service.