I have been etching pictures onto granite monuments since 1990, and have done over a thousand of them. They can be found in cemeteries all over New England and New York. Polished stones are notoriously difficult to photograph, so these pictures represent somewhat of a random sampling.
Here is an article from the Boston Globe, February 4, 2005.
Here is a link to an article written by Steven Heller for Print magazine, August 2008.