These earrings are made of wood, measure 2 inches long. Covered in metallic gold leaf and covered in resin. The paint is acrylic paint. 
The ear wire is 14Kt gold-filled, 14mm flat fishhook with 2mm coil and open loop, 22 gauge. 
Although these are not expected to tarnish, avoid getting wet. Wipe with soft cloth. Use care not to get lotion or creams on them.