Astrid is designed so that nothing competes with its extraordinary centerpiece: an over three carat antique old mine cushion cut diamond with H color and SI1 clarity belonging to a category of antique diamonds that has become increasingly scarce, as stones of this size and quality were uncommon to begin with and many have since been recut into modern brilliant cuts over the past century. Hand fashioned long before modern diamond-cutting technology, every old mine cut is inherently unique. Rather than being cut to precise mathematical formulas, these diamonds were shaped by eye giving each miniature sculpture its own distinct personality. Astrid is not a design we produce on demand. We create this setting only when we find an antique diamond worthy of it, a stone with exceptional character and presence. Each ring begins with the search for that singular diamond, allowing its proportions to dictate the final piece. The 18k yellow gold mounting features pronounced crown-style prongs inspired by Victorian jewelry. Set low on the finger, the mounting balances delicacy with security while drawing the eye entirely to the hand-cut diamond above. Handcrafted by Erstwhile in the heart of New York City, the Erstwhile Collection showcases rare antique diamonds elegantly set in precious metals. Details Item: ASTRID YG 3.03HSI1 Stone: Natural 3.03 carat antique old mine cushion cut diamond with H color and SI1 clarity and GIA Report #2215426634 Metal: 18K yellow gold Measurements: Center measures 9.8mm tall and the band measures 1.7mm Current ring size: 6.5 (ring can be re-sized) Crafted in NYC and can be custom ordered with your specifications Shipping We offer free shipping. Orders will be shipped within two business days via insured FedEx delivery unless add-on services are applied. All orders will be arranged with you, the purchaser, and will not ship without your approval. If you have an important date in mind, let us know so we can plan accordingly. All shipments require an adult signature. International shipping is $175 Return Policy We accept returns within 14 days of receipt. We offer free shipping on returns in the US; contact us to arrange a return or exchange. We will provide a free return shipping label that will be insured. Purchases shipped back without our knowledge will incur a fee equal to 10% of the purchase value. Returns without our knowledge which are then lost/stolen in transit, are the sender's responsibility. Customize You can personalize this ring with your preferred carat size, color, and clarity, available in platinum, 18k yellow, or rose gold. It's important to mention that we exclusively use natural antique cut diamonds. The creation of bespoke projects typically requires about 4 to 6 weeks. Email us to start a bespoke project.