Jewelry Lab: 52 Experiments, Investigations and Explorations in Metal has a great tutorial on fold forming.
To make a matching pair of earrings, cut a design (half an oval, half a teardrop, etc.) out of paper, then use this template to trace outlines on the folded side of your piece of sheet metal.
Hammer both earrings until you decide you're done, before you unfold either one. This helps your pair be a close match.
You can solder your own custom-made fine-silver ear wires into the crevice of the fold, or (before unfolding the design) punch a hole 1-2mm from the top, on the fold line, and dangle these from pre-made ear wires.
When soldering the ear wire onto the form, you might want to carve a groove into the fire brick to help hold the fold-formed piece.
Use the tweezers for quenching the piece, and also for propping the ear wire when soldering. A "3rd Hand" tool can help properly position the tweezers when soldering.
When done, tumble for a bright finish, or antique with liver of sulfur for a vintage finish.