Errrrr, stuff, it's hewn out of solid gold
Not really, it's a 'frame' made from the back of a writing pad, fiddle but worth it, about 2.5"square
Decoupage with gold paper
Then using fimo make the 'tile', and cook it, then using enamel paint paint it and stick velum paper on the back to write on with a nice festive message typed on with my trusty second hand typewriter