<http://schema.org/about>
"Worth more than $1 million, this gemstone is distinguished for its rich color palette and light-refracting qualities that defy description."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/wilderness-resources/blogs/say-hello-virgin-rainbow-finest-opal-ever-unearthed>