Though it has long been known as a black marble tombstone, the investigation showed that the rock is actually black limestone, with enclosed fossils connecting the stone to either Ireland or Belgium.

"This collection is very special to me," admits Faye Toogood as she tours a group through her latest exhibition at Friedman ...

Metamorphic rock is formed when existing rock is transformed under high heat and pressure, which generally destroys any fossils that were in the rock before it was metamorphosed. For example, marble ...