Cut your chain into 2 equal lengths. Set one aside for your second earring.
Open 1 of your eye-pins.
String your piece of chain thru the heart, bringing both ends together onto your eye-pin.
Close your eye-pin.
Add a round crystal, silver rondell, and crystal round on to your eye-pin.
Wrap your eye-pin, trimming excess wire and attaching to your head pin.
Repeat for your second earring.