Diamonds are valued according to the 4C's of Diamond Grading namely, Cut, Clarity, Color, and Carat weight.
The cut of a diamond refers to its proportions. It is one of the most important factors to be considered when choosing diamonds. Clarity refers to how clear, or "clean" the diamond is. Diamonds have imperfections which are present in its rough state.
Diamonds allow light to be reflected and dispersed as a rainbow of color. The color is graded from sparkling colorless white towards the more fancy colors. The weight of a diamond is expressed in carats. The word carat originated from the carob tree or Ceratonia siliqua.