For example, diamond is only one number away, but it’s many times harder than gems in the corundum family. Peridot is 6.5 to 7 on the Mohs scale. It has fair to good toughness. Peridot is durable ...

This magnificent 130.60-carat antique cushion-cut peridot displays the gem's finest attributes: a medium-toned, highly saturated yellowish green hue and high clarity. Peridot is readily available for ...