Antique Art Deco 0.65ctw Platinum Old European Cut Diamond Ring IGI Cert Size 5

A magnificent, authentic engagement ring crafted during the height of the Art Deco period—one of the most desirable eras in fine jewelry history. Constructed in solid 90% platinum, the ring features a central 0.50-carat Old European cut natural diamond set within a square illusion box head with milgrain edging. Channel-set into the shoulders are six single-cut accent diamonds, bringing the total weight to 0.65 carats. Accompanied by IGI Certification verifying its authenticity and quality specifications. Gemstone & Diamond Specifications Center Diamond: Carat Weight: Approx. 0.50 Carats Cut: Old European Cut Natural Diamond Color Grade: H – J (Near Colorless) Clarity Grade: VS1 – VS2 Setting: Square head frame with decorative milgrain Accent Side Diamonds: Quantity / Cut: 6 Single Cut Natural Diamonds Combined Side Carat Weight: Approx. 0.15 ctw Color Grade: Near Colorless (G–H range) Clarity Grade: VS2 – SI1 Mounting & Setting Details Metal Construction: Solid 90% Platinum (900 Platinum) Design Features: Intricate Art Deco geometry with milgrain-bordered shoulders and openwork gallery undercarriage Gross Weight: 2.40 dwt / 3.73 Grams Current Ring Size: 5.0 — Can be professionally resized upon request Included Documentation: Official IGI Certificate Condition & Seller Notes Condition: Good antique condition with crisp milgrain borders and clean structural integrity. Notes: All seven diamonds are securely mounted. Features authentic Period craftsmanship characteristic of 1920s–1930s platinum work. Please inspect macro photographs and IGI certificate details prior to purchase.