<https://blackopaldirect.com/product/rough-opal/3-78-ct-rough-opal-piece-13mm-across/#product>
<http://schema.org/name>
"3.78 ct rough opal piece 13mm across"
<https://blackopaldirect.com/product/rough-opal/3-78-ct-rough-opal-piece-13mm-across/>