<http://schema.org/description>
"18ct (750\u00B0/oo) white gold and platinum (900\u00B0/oo) solitaire ring set with an old-mine cut diamond of approximately 0.55ct.\r\nModifiable ring size : 52 - L-1/2 (UK); 5-7/8 (US)\r\n1960s \r\nGross weight : 2.45g (0.08oz)."^^<http://www.w3.org/2001/XMLSchema#string>
<https://en.expertissim.com/our-works-of-art-and-antiques/jewellery/grey-gold>