The Greeks regarded diamonds as tears of the gods. It is a derivation of the Greek word “adamas,” meaning unconquerable, that gave the diamond its name.  Each stone’s complex characteristics cannot be duplicated, and no two diamonds can ever be the same.

The most rare and priceless diamonds available are actually  colored diamonds.  "Canary" yellow is the most common. 

Want to see a $1,000,000 12ct Yellow.

                                                                                         (Source:  Diamonds)