The dance of brilliance and fire that shines in a complex blend of fiery light is unmistakable – it can only be a diamond. But just as each story behind a piece of diamond jewelry is unique, every diamond has its own characteristics, and no two are exactly alike.

There’s a lot that goes into buying a diamond, and it’s important to understand how diamonds differ from one another, and the way gemologists rate diamonds for quality. Professionals judge diamonds by the universal method of the 4Cs – according to their cut, color, clarity, and carat weight.


When referring to a diamond’s “color,” it’s actually the lack of color that is most sought after. Colorless diamonds are generally accepted as of the highest quality, and they are the rarest. Diamonds known as “fancy,” which are other natural colors such as pink, blue and red, have a different color grading scale than colorless diamonds.



The “cut” is an essential factor in determining a diamond’s beauty – and its worth. A grader must evaluate the cutter’s skill in fashioning the diamond in order to determine the quality of the cut. A more precise cut results in a more sparkling, captivating diamond.



The “clarity” or transparency of a diamond indicates the absence or presence of blemishes or inclusions. When grading the clarity of a diamond, the lab determines the relative visibility of the inclusions in a diamond and their impact on the overall visual appearance. While most diamonds do not have flawless clarity, most blemishes or inclusions can be seen only with magnification.



“Carat” is the physical weight of a diamond, measured in metric carats. One carat equals 1/5 gram, and is subdivided into 100 points. Of the 4Cs, carat weight is the most objective.

At Robert’s Jewelry, our trained and knowledgeable staff can show you a variety of diamonds in order to help you understand what diamond grades mean to the appearance and value of a diamond. Whatever sort of jewelry you’re searching for, we can help you choose a piece that displays your style, meets your budget, and features exceptional diamonds that can be worn with delight for a lifetime.