Earrings made of brass (copper and zinc) with an icoting coating in your choice of silver or gold. Carved in the shape of a tree of life. Ethnic earrings in your choice of silver or gold. Carved in the shape of a tree of life. Composition: Brass with icoting coating. Brass is a fusion of copper and zinc, and icoting is an electrolytic coating that keeps the brass silver-colored for longer and gives the plated piece more shine. Measurement: 3.5 cm in diameter approx.