Base Metal – 925 Sterling Silver. Type of Stone – Turquoise, Adstar Cz Diamond. Cut – Cabochon, Round / Brilliant. Certified – Authenticity by Adastra. Ring/Bracelet – All Sizes available. THE HOUSE OF ADASTRA. Custom jewelry that reflects your individuality and style. Collaborated with customers for more than a decade to create custom pieces. Our highly skilled artisans meticulously create your personalized jewelry. Custom jewelry can be ordered in 18K Gold, 14K Gold and/ or natural certified diamonds, lab grown diamonds, moissanite, and natural gemstones. Get in touch to know more. Kindly check with your port before ordering. Feedback and Follow Us. Prompt Assistance: We strive to provide proper solutions and address your queries promptly. Follow us on social media to see our new collections. Vintage jewelry, diamond jewelry, art deco jewelry for women, reproduction jewelry, handmade jewelry.