In the past, one of the most common techniques to test if a diamond was real or synthetic was to scratch the gem against glass — if the glass is scraped or scratched, the diamond's real. But this ...

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 ...

Lab-grown diamonds have become a popular choice for jewelry and engagement rings because they’re more affordable and are sourced sustainably. However, if you’re wondering whether lab-grown diamonds ...