Your tile mosaic would be awesome i am sure...
My friend just stuck the cut up pieces on a clear block the size and shape you want... she made hers sort of round... . She stamped her image, a sail boat and colored it. then stamped the mosaic using veramark over her image and then used a brown distress ink to sort of patina it and rubbed it off.. she then framed it with circle on her card. Anyway hope that makes sense but I thought it was very pretty and great for a man's card.