Rocks Everlasting Collection 18ct White Gold Eternity Ring With 5 Claw Set Diamonds This stunning 5 stone diamond eternity ringwould look great stacked alongside an existing engagement ring. Eternity Rings are often gifted after a few years of marraige and this 5 stone would be a great choice to add to a collection. Total Diamond Carat Weight: 1.29ct Mined Diamonds A mined diamond is a 'natural' diamond that is formed from carbon being subjected to extreme heat and pressure deep underneath the earth's crust. Natural diamonds are each unique, a tiny piece of geological history of the planet Earth.