I haven't got a chance to visit Morocco, in India I once visited Mahabalipuram[1] which is famous for its stone art. There are shops where artist sell stone sculptures while working on the next piece right there.[2]

I bought a lamp shade from there[3], the pieces are hollow spheres with different kind of patterns chiseled out of single stone. You put the lamp inside. They told me it takes at least a day or two to make one.

[1] http://sree.avinmedia.com/tag/mahabalipuram/

[2] http://www.trekearth.com/gallery/Asia/India/South/Tamil_Nadu...

[3] http://media-cdn.tripadvisor.com/media/photo-s/03/01/f5/82/s...