Diamond Ring Pointed Arch Dome 18k Yellow Gold Size 8 Etsy Buy Radiant Arch Diamond Ring Online CaratLane MOSAIC ARCH ENGAGEMENT RING Diamond Yellow Gold Arch Unisex Ring For Sale at 1stDibs. A captivating piece inspired by the archways you would find across Indian architecture. Heavyweight ring with three layers combined with a double band. Available in sterling silver, 9ct yellow gold, 18ct yellow gold. All pieces are handmade in mata's London studio and are tested and hallmarked at the London Assay Office a guarantee of quality for over 700 years. Each piece is made to order and requires a 35 week lead time for production.