Asian Painting on Stone

This painting is one of four that came out of my Grandmother's house. They are quite large and heavy, because the painting surface is stone, maybe marble or quartz. The paintings are all different Asian scenes, very intricately done. The frames are heavy, dark wood, with Asian looking, decorative metal hangers.

Anything I can find out about them would be appreciated. They may be from WWl or WWll time, not sure.

Thanks, Kate