These beautiful ethnic spiral hoop earrings are made by craftsman from Jaipur India.

It is made of brass (an alloy of copper and zinc). Brass is a good alternative to gold, it does not change color and does not decompose over time.  It does not cause allergy.  So you can wear it without fear. 
 
It is also very easy to clean by rubbing it with a little toothpaste and lemon juice.