<http://schema.org/description>
"18ct yellow gold bar brooch set with three cabochon-cut opals with alternate small rubies.\r\n\r\nBrooch length : 4.5cm (1-3/4in).\r\n\r\nGross weight : 3.8g  (0.13oz)."^^<http://www.w3.org/2001/XMLSchema#string>
<https://en.expertissim.com/our-works-of-art-and-antiques/jewellery/brooch/ruby>