<https://www.catawiki.com/a/327541-diamond-auction-colour-treated-clarity-enhanced>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/Thing>
<https://www.catawiki.com/l/38359131-diamond-0-60-ct-cushion-d-colourless-si1>