custom blend of annie sloan Coco and Old Ochre and highlighted with both clear and dark waxes Try 8 parts coco and 2 parts old ochre. Random blobs of silver metallic paint brushed with clear wax. When dry "pounce" dark wax and brush in one direction.
Chalkboard desktop for inspiration. You could use 3 coats of Graphite Chalk Paint by Annie Sloan for the chalkboard, and Emperor's Silk for the desk. I like it all except the chalkboard top. Would like to paint my desk it is similar.
DIY: excellent tips here on how to apply dark wax, how to conserve paint by thinning down on second coat and how to transfer a projected image onto the furniture for adding french lettering. from purple painted lady