Mosaic Cross 12 - Original one of a kind design. Made with stained glass, metal charms and beads on wood base. Best for interior display.
Mosaic cross from Freshwater Mosaics now in my Etsy shop Freshwatermosaics
Mosaic Cross by AdrianaBitsandPieces on Etsy
Not a great example, but I could do a simple (but not too simple) linear version of a cross similar to some of the other art you've pinned, have that overtop a more complex background.
Sea Green Mosaic Cross with Starfish by StashasCreations on Etsy