my mosaic

my idea for my mosaic is to do a series of four light switch covers and make then look like the four elements; water, fire , air , and earth. I am trying to brainstorm some possible ideas for what materials I could use for each light switch cover , I will do a blog post regarding each one of the elements and the ideas I have already come up with for the materials , if anyone has any suggestions for possible materials feel free to comment them below. :)