Our Astra Ring is so dainty & sweet. Astra, meaning "of the stars", is a beautiful ring made for every day wear! She's made with quality in mind, and meant to last a lifetime with proper care. FEATURES Gold vermeil ring (.925 sterling silver base with a thick layer of gold) Lab opal star adorned with white cubic zirconia Rounded gold band designed for a classic look QUALITY The Astra Ring is part of our demi-fine collection of rings. What is demi-fine? All of our rings in this collection are made with Vermeil (pronounced vehr-may), which is a type of jewelry made with precious metals aimed to last a lifetime when cared for properly.In order to be called “vermeil,” the jewelry must meet the following quality conditions: Base material is sterling silver (92.5% pure silver + 7.5% other materials) Gold plating must be at least 10k Plating is at least 2.5 microns thick The gold rings in our Opal Ring Collection are high-quality gold vermeil with 3 microns of 14k gold over a 92.5% sterling silver base, which is above the minimum requirement for vermeil. This means the rings are durable, affordable, long-lasting, and hypoallergenic! Click here learn more about gold vermeil.