Metal: Sterling Silver with 14k Yellow Gold Filled Closure: Push Back Handmade item Size: Approx. 10mm * 5mm Gift wrapping available Jewelry Pieces Ships from a small business in New York City USA. What is sterling silver? Since its creation, sterling silver has been used in jewelry design by all cultures across the world. Sterling silver contains 92. 50% pure silver and is mixed with other alloys such as copper, zinc, or palladium to make it stronger and more durable overall. From a manufacturing perspective, this implies that sterling silver can be worked and re-worked repeatedly without losing its quality at a fast pace, unlike pure silver, which could potentially change shape or become weaker after repeated uses. Made in: United States of America.