How hard are lab created diamonds?
Because lab diamonds are chemically identical to real diamonds, they are extremely hard. Lab diamonds can scratch glass just like a real diamond. Do created diamonds have flaws? Yes! This is a common misconception. Lab diamonds are just as likely to have flaws in the stone as a real one. These are called inclusions and a good gem cutter will be able to minimize the visibility of these. The greater the clarity of a created diamond the greater the rarity and higher the price, just like a real diamond.