There are many different characteristics of what a natural diamond looks like. These characteristics are useful to know when digging for diamonds. You can find more info at: en.wikipedia.org
It is important to know exactly what a natural diamond looks like if you plan on digging for diamonds, as they do have many different characteristics. Natural Diamonds sometimes look like clumps of dirt or sugar cubes.
A natural diamond typically looks yellow, brown, gray and colorless. But, diamonds come in so many shapes and forms so it's hard to narrow it down. Where as some look like dirty stones, others are bright and colorful, and some look like sugar cubes.