What does a black diamond look like?

A black diamond is a diamond with a very dark color, ranging from deep dark gray to almost black. The color is caused by the presence of graphite inclusions, which are tiny particles of carbon. Black diamonds are very rare, and are found in only a few locations around the world, including Brazil, South Africa, and the Central African Republic. They are often used in jewelry, and are especially popular for use in engagement rings.

Here are some additional characteristics of black diamonds:

* They are typically opaque, meaning that light does not pass through them easily.

* They have a high refractive index, meaning that they bend light more than other diamonds.

* They are very durable, and are resistant to scratching and chipping.

* They are often referred to as "fancy diamonds" because of their unique color.