Search craftmarks

This is like the stone + felt trivet tutorial, but instead of using two pieces of felt, it uses a pre-existing cork trivet and glues the stones onto that. One could use flat glass pebbles instead of stones.

(Mind you, it seems a bit pointless to replace a perfectly useful cork trivet with an uneven stone trivet, but I'm bookmarking this anyway)

This tutorial just uses stones and felt.

I've also seen a suggestion that one could stiffen up the trivet by sandwiching a CD in between the two pieces of felt. Though that would make something closer to the size of a coaster than a trivet.

One could also use those flat glass pebbles instead of stones.