A white topaz is much softer than a diamond. The average white topaz scores an 8 on the Mohs scale. While 8 is a respectable rating, it’s still far short of a diamond. Cubic zirconia fares slightly better with an average of around 8.5. The white topaz vs cubic zirconia ranking for durability comes out in favor of cubic zirconia. Real diamonds refract light so thoroughly that you wouldn't be able to see much of anything. Another guideline involves evaluating the weight of the stone. Cubic zirconia will weigh about 50-100% more than a real diamond of similar size. Of course, if you're not used to weighing diamonds, this test might not help you all that much. Lab-made diamonds are composed of carbon atoms (like mined/natural diamonds), while cubic zirconia are simply manufactured to only look like diamonds. Diamonds vs Cubic Zirconium. Compared to diamonds, cubic zirconia is significantly cheaper. Therefore, for any buyer wanting a particular setting, style, or ring, cubic zirconia might be an Unlike CZ, diamonds are not always Flawless & Colorless. Fire and Brilliance in diamond are more appealing and decent compared to CZ. The contrast in diamonds gives a wow effect to the viewer's eye. Hardness & Durability. Hardness score for CZ is 8-8.5 on Mohs scale and durability is very less. To tell if your diamond is real, place the stone in front of your mouth and, like a mirror, fog it up with your breath. If the stone stays fogged for a few seconds, then it's probably a fake. A real diamond won't fog up easily since the condensation doesn't stick to the surface. 2. Appearance. Simulated diamonds and cubic zirconia are both visually similar to real diamonds, but there are a few key differences in appearance. Simulated diamonds have a more vibrant sparkle and shine than cubic zirconia, and are often more colorless. On the other hand, cubic zirconia can have a slightly yellowish hue and is more susceptible Diamond vs Mossanite vs Cubic Zirconia: The Four C’s. When it comes to diamonds, the Four C’s are quite literally the law. Read on to find out if moissanite and cubic zirconia make the cut A CZ described as a cubic zirconia in a jewelry ad isn't an imitation. In contrast, a CZ represented as a diamond "lookalike" is an imitation. Many vendors frequently sell imitation gemstones, typically for far less than the gems they imitate would cost. Aulz.