Diamonds have been a very desirable gemstone for millennia. The most common imitations are Cubic Zirconia and Moissanite. Cubic zirconia and moissanite are very difficult for a layman to differentiate from a diamond, they both look very similar to diamonds and have a similar brilliance.
- Diamonds are harder than any other material available. A simple scratch test gives usually a high degree of accuracy. It is possible to buy a diamond scratch pen with a sapphire (hardness 9) or borazon(hardness 9.75) needle and scratch the diamond to see if it leaves a mark. This method is usually not preferred as it can leave a mark on the diamond. When analyzing worn jewellery if you notice any wear and tear on the diamond you can be sure the stone is not a diamond. The lack of wear and tear is on itself not a proof that the stone is a diamond.
Diamonds love grease, an easy way to test if a diamond is real is to put some grease on the table of the diamond, then stick it to glass window. If it sticks, it’s a diamond!