What is a 'treated' diamond?

What is a 'treated' diamond?

John Cordova (Vice President of Human Resources, Robbins Bros.) gives expert video advice on: What is a 'treated' diamond?; What is a 'clarity enhanced' diamond?; Why would I purchase a treated diamond? and more...

A diamond that is treated is a diamond that has been altered. It's look has been altered either to alter the color or the clarity.