<http://schema.org/itemOffered>
"Burma Star Sapphire - blue - oval - 19.2x14.2mm - 19.76carats"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.simplysapphires.com/stars/burma-star-sapphire-blue-oval-19.2x14.2mm-19.76carats>