These Peacock Feather earrings with stone are made by the craftsman from Jaipur in India. They are made of brass (an alloy of copper and zinc).
 
Brass is a good alternative to gold, it does not change color or decompose over time. It does not cause allergies, so you can wear it without fear. 
It is also very easy to clean by rubbing it with a little toothpaste or soap and lemon juice.