Inspired by nature and the adventures that we've taken, each piece of Nature Cast jewelry reflects the spirit of the outdoors. All our products are thoughtfully crafted and hypoallergenic, ensuring comfort for all-day wear. Dangle Earrings: There are a variety of ear wires that are used, including stainless steel, gold fill, sterling silver, and rose gold fill. For more details, visit our FAQ tab at naturecast.com or feel free to reach out to us directly.