Below is an example of diamonds ranging from I-F. As you can see, the stones range from Included or Imperfect (I 1-3) to Internally Flawless (IF).

Depending on the quality of diamond you are searching for, price will be adjusted by the level of clarity in the scale. Many of the larger jewelry retailers will have GIA certifications. The certifications will provide a plot map of the diamond and its internal and external characteristics. For the inexperienced eye, the certifications provide trustworthy summary of the stone, some call it the diamonds fingerprint. If a certification or a private appraisal is not provided, then it is vital as a buyer to have some skills grading clarity. Here is a brief description of each category graded by the GIA.