I like the concept & textures, but I think you could've been more subtle with the subject. For instance, if it was raining in the image, the tear would still make sense but be more integrated into the "natural" feeling of the stone. The eyelids/bottom eyelashes also bother me. You could use different shading techniques to give the illusion of both, methinks; otherwise it looks too contrived. Anywho, I love the concept.