I wish I knew more about these lovely earrings.
Other than the tab of the clip, I believe the whole thing is hand made, from the wire frame that holds the coral, to the frame that holds the wires and the coral itself all appear to be hand fashioned. It is my understanding this coral is no longer available, which makes these beauties extra special. Probably 1950s vintage, given the size.
Each piece of coral is a slight tear-drop, and wired by brass into a circular frame that attaches at the back.
1 1/8″ across, brass construction and no marks.