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A 1-carat cubic zirconia (CZ) is not the same size as a 1-carat diamond, because the densities of the two materials are not equal, so the size of the two cannot be equal. Cubic zirconia is denser than a diamond, and when... More »

The diameter of a one-carat round or brilliant cut diamond typically measures between 6.4 and 6.5 millimeters. The term carat refers to weight not size, so a one-carat diamond doesn't need to conform to specific measurem... More »

A 1-carat diamond ring is a piece of jewelry that features a 1-carat weight diamond or multiple diamonds totalling 1 carat affixed to a circular band, which is usually made out of a precious metal. The ring is meant to b... More »

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To tell the difference between diamond and cubic zirconia, breathe on the gem to fog it up. If it clears up instantly, there is a good chance it is a real diamond because diamonds are good at conducting heat. Alternative... More »

The best way to tell if a stone is a real diamond or a cubic zirconia is by using a pen-sized probe called a diamond tester. When looking at the surface of the stone, a real diamond will be free from scratches and the di... More »

Naturally black diamonds are extremely rare and can have a very high value, depending on the cut, color, clarity and carat size of the diamond. The most accurate way to learn the value of a black diamond is to have it ap... More »

A DiamondAura stone is similar to a Cubic Zirconia, or CZ, stone. The DiamondAura stones are manufactured in a laboratory and are not real diamonds. More »