To start, cut 3 chains at different lengths per earring. Here we took about 6cm for the longest one. 

You can either use simple chains or incorporate, as shown here, a small rosary chain. A great tip for using leftover chains!

Then connect the 3 chains onto a 4mm ring.

Place a small drop of glue on the earring base, then gently place the cabochon. Be careful not to use too much glue.

To finish, open a 3mm ring and connect the chains, the wavy pendant, and the earring base together. Be careful with the order of the elements; the chains should be behind the wavy pendant.

And there you go! Beautiful creations ;-)