The Mohs scale is a widely used method for measuring the hardness of gemstones, including cubic zirconia. Developed by Friedrich Mohs in 1812, this scale ranks minerals on a scale from 1 (softest) to 10 (hardest). Compared to diamonds, which score a perfect 10, cubic zirconia, a popular diamond alternative, has a Mohs scale hardness of only 8.0
You can use this device on loose stones and diamonds to ensure that your diamond is not cubic zirconia or white sapphire. Using this tool, you will weed out the fake diamonds. Synthetic diamonds, also known as lab grown diamonds, will pass the test because a man-made diamond is a real diamond. Cubic zirconia or white topaz will not pass the test. v0y8U.