Antique Two-Tone Diamond Engagement Ring in Yellow Gold & Platinum.  This shimmering Deco two-toned engagement ring features a .44 carat round brilliant cut diamond and is set in platinum and 14 karat yellow gold. The diamond is bezel set in platinum with sharp engraved angles running down the shoulders. The diamond is set high above the finger with a series of parallel open spaces to let light into the gemstone.