What you will need

Pliers
Some inches of steel wire (or a paperclip)
A nice thumbtack
Glue

Bend the sting of the thumbtack close to its basis

Stich the wire into the tack

Form the desired shape of the pendant

Cut the excess of the wire

Make a small arc so that it can be attached on a lace

If thumbtack is loose, drip a drop of glue on the back

Ready to go!