Here is what the glass pendants look like before I add the silver bails. (Bails are the glue-on loops that enable you to turn a flatback stone or cabochon into a pendant)
Another way that I make postage-stamp jewelry is by using polymer clay. With the clay, I can choose a beckground color that enhances the appearance of the stamp.
Some of my favorite stamps are those from countries that no longer exist and ones commemorating events/people not from that particular country. i.e. a Rwanda stamp celebrating JFK! Ok, maybe I am too easily amused.