Vintage Paua Abalone Shell Hammered Copper Earrings

These fun earrings combine abalone shell with silver metal and hammered copper.  They look very ethnic and earthly.  Measure a bit more than 1 3/8 inches across so they are on the large side.  The clips work well.  I'm not sure of the date on these but they should be somewhere between 1970-1990's.  They are not signed.

In excellent condition.