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How do you tell if you have a treated diamond?

Diamonds: Real Or Fake?

John Cordova (Vice President of Human Resources, Robbins Bros.) gives expert video advice on: How do you tell if you have a treated diamond?; If I can scratch glass with my stone, does that mean that I have a diamond?; How can I tell a diamond from a fake using a newspaper? and more...

If I can scratch glass with my stone, does that mean that I have a diamond?

Traditionally and in the old days you'd scratch a piece of glass with a stone, and if it did you thought it was a diamond. The fact is that there are other stones other than diamond that will scratch glass. You really can't tell for sure whether your diamond is a real diamond or not just by simply scratching glass.

What is the 'weight test' when judging if a diamond is genuine?

When judging whether a diamond is genuine or not using the weight test, one takes a diamond weighing scale, and places the diamond on that scale. If that stone that appears to be a one carat is heavier than a one carat by almost double, about eighty-five percent, then is not a diamond. The most commonly used simulate is cubic zirconium. and a cubic zirconium weighs about eighty-five per cent more than it's similar looking counterpart, a diamond.

What is the 'UV test' when judging if a diamond is genuine?

When judging whether a diamond is genuine, use the U.V. test. What you're looking at is, something that's based on the fact that a percentage of diamonds fluoresce under U.V. light. So if you take your diamond, the stone that you have, and you place it in a U.V. light unit, and it fluoresces, chances are, that is a diamond. The problem with that test is, a percentage of diamonds don't fluoresce at all. So no fluorescence doesn't necessarily mean that the stone you're looking at isn't a genuine diamond.