<http://schema.org/name>
"Madagascar Blue Marquise Star Sapphire 3.18 carats 12x6.8x3.9mm"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.simplysapphires.com/stars/madagascar-blue-marquise-star-sapphire-3.18-carats-12x6.8x3.9mm>