The girdle is an important part of the diamond for its protectiveness against damage, but it must also be attractive since it is easily viewed. The description of “attractive” is used so you can be aware that the girdle, like all other diamond features, may be pleasant or unpleasant in appearance. After you examine a few diamonds, you will begin to see a lot of the unpleasant or unattractive features that lower the value and salability of a diamond including “Extremely Thick” or rough girdles.