Clarity is the degree to which tiny marks of nature called inclusions are present in the diamond. A "flawless" diamond has no inclusions which are visible under 100power magnification.
Most diamonds contain tiny natural marks called inclusions. The number of inclusions, their size and location all affect the diamond's clarity grade.
Diamonds range from colorless - the rarest and most valuable - to yellowish, with a spectrum of shadings in between. Color can only be seen with proper lighting against a white background
Carat is the Standard measurement for diamond size. The most obvious variable, it is actually the least important in determining the beauty of a diamonds.
Diamonds weights are measured in carat. Every carat is divided into 100 points. For Example, a 25 point diamond is ¼ carat.
Not to be confused with the shape of the diamond, cut refers to the arrangement of a diamond's facets. Cut is the most important of the 4C's because it determines the optimum combination of brilliance, dispersion and scintillation. This combination has the greatest effect on a diamond's beauty. ut is the only "C" under man's control. A diamond which is "ideal cut" captures and releases the maximum play of light.
An ideal cut diamond is more beautiful than other diamonds because it maximizes the play of brilliance, sparkle and fire.