Compared to a lab diamond, CZ is denser and thus heavier and has a small visual appearance than the lab-grown diamond. Quality Grade. The quality grades of lab diamonds aren’t the same as that of CZs. CZs are graded using grades 1A and 5A, where 5As are the best quality diamonds, and 1A are the worst. There is also one grade, 3A (AAA), and Another way to tell a real diamond from a cubic is by looking at the refraction of light. When light hits a diamond, it is refracted in a different way than when it hits a cubic zirconia. This is because diamonds have a higher refractive index than cubic zirconia. Lastly, you can tell a real diamond from a cubic by looking at the weight of the In complement to having a high refractive index of 2.69, Moissanite has a refractive index of 25 percent more than a diamond. The higher the refractive index of a gemstone, the more brightness it originates when illuminated. The dispersion of light in Moissanite is 58 percent larger than that of cubic zirconia. Diamonds have several "fake" counterparts that can easily be mistaken for real diamonds—natural gemstones with a strong resemblance to diamonds are white sapphire, white topaz and colorless zircon. There are also gems created in a lab, like YAG (yttrium aluminum garnet), GGG (gadolinium gallium garnet), CZ (synthetic cubic zirconia) and Diamonds are known for their exceptional hardness, rating a perfect 10 on the Mohs scale of mineral hardness. Cubic zirconia, though still a relatively hard material, rates lower at 8.5 on the Mohs scale. This difference in hardness means that diamonds are less prone to scratching and chipping than cubic zirconia. Cubic zirconia is purely colorless and refracts light to create brightly colorful flashes of light in a rainbow of colors, similar to Moissanite. Best suited for costume jewelry, Cubic zirconia is an inexpensive diamond simulant that will dull and scratch fairly quickly. Lab-grown diamonds are identical to mined diamonds. Cubic zirconia, often abbreviated as CZ, is a synthetic gemstone that closely resembles diamond. It’s composed of zirconium oxide (ZrO2) and is valued for its brilliance and affordability. CZ has been used in jewelry since the 1970s as a cost-effective alternative to diamonds. Its crystalline structure and optical properties give it a sparkle Cubic Zirconia vs. Diamond – Refractive Index (RI) Diamonds and CZ have a refractive index reflecting how much light bends as it passes through the stone. The CZ has a 2.15 to 2.18 RI, while diamonds have a 2.42 rating. The diamond has more brilliance because it reflects more light to the eye. Yes, the average person can tell the difference between cubic zirconia and diamond. Cubic zirconia is a man-made stone that is created in a lab. Diamonds are natural stones that are mined from the earth. Cubic zirconia is usually less expensive than diamond. Diamonds are harder than cubic zirconia and will not scratch as easily. The Composition and Cubic Zirconia are different; diamond is composed of carbon, and CZ is composed of crystals, making a big difference. The weight of a diamond is heavier than Cubic Zirconia, CZ is 2.6g/cm3, and diamond is 3.52g/cm3. This makes the diamond denser than Cubic Zirconia. Shape. Diamonds are measured in 4Cs (Cut, Color, Clarity o4mVc.