Heart & Arrow Scope For Examining The Cut Of Diamonds. This is a new heart & arrow scope. It is used for examining the cut of diamonds. When viewing a round diamond through this scope you should see arrows through the top of the diamond and hearts through the bottom. The hearts and arrows pattern shows the optical symmetry of a diamond. This scope includes red and blue inserts. It measures approximately 2 1/4" x 1" (57.15 x 25 mm). We work hard to update our descriptions and pictures of our merchandise. As part of a process of ongoing innovation by our suppliers, newer versions of the item shown may be shipped before we are able to complete an update. As a result there may be a slight variation in color and design.