Unsure of whether your sparkler is a synthetic? Turn to one of these methods to check. Reviewed by Sandy Ip When you're first examining your own diamond or that of a loved one, you may take notice of ...

Two samples of carbon crystals, which are clear and give off a kaleidoscope of spectral colours under direct sunlight, may appear to be identical. However, one is a billion years old, and the other is ...

So you’ve inherited some jewelry from a relative, or got a potential bargain on a few pieces at a flea market or estate sale. How do you know if it’s costume jewelry or the real stuff? You could take ...