When a diamond is as hard as an ice cube: A rarest form of diamond

The hardest diamond ever discovered is just one of hundreds of diamond varieties that can be found.

In fact, the hardest material is the crystalline form, or blazeword, of diamond, which is composed of the hardest elements known.

And there are several other diamond-rich materials that can also be found, but are often thought of as harder.

Here’s a look at what it means to be “the diamond” and what makes it so hard.