18k Gold Plated Hooks, 14k Gold Filled wire and your choice of stones. The wire wraps the stones you pick in each side of the earrings, securely and delicately for a chic look. 
The stone amount and the way the stone sits when wrapped will depend on the stone type that you pick. 
Some stones will be either raw but smooth, raw but jagged, round and faceted, or round and smooth. Pick your stone at the drop down.
Stone pictured is Scheelite.