Estate 18 Karat Yellow Gold Diamond Wide Necklace For Sale at 1stDibs 18 kt. Yellow gold Necklace Diamond Catawiki Asprey 18ct Yellow Gold Necklace Set With 1 Round Brilliant Cut Diamond 18ct Yellow Gold Diamond Necklace Buy Online Free Insured UK Delivery. This elegant necklace features a single round brilliant cut diamond at the centre of solid yellow gold pendant, on a yellow gold chain. Available to purchase in store. To enquire please contact us by emailing info@sargisons. com. au or calling (03) 6234 2426. Gemstone: Diamond. Colour: H. Total Diamond Weight: 0. 09ct. Diamond grading: SI. Metal: 18ct Yellow Gold with a high polish finish. Pendant approximately 5mm x 15mm in size (not including bail.) 18ct yellow gold 45cm fine diamond cut curb chain. Presented in a Sargisons box. FREE GIFT WRAPPING We adore gift wrapping your jewels! If you would like your purchase to be gift wrapped please click here to add complimentary gift wrapping to your cart before checking out.