The Diamond Grading Plot
Diamond graders draw a diagram of the inclusions in the diamond (left) to a diagram (right) to create a map of the diamond's inclusions, called the "plot”. The plot will be used to help the diamond lab give the diamond its final grade on the clarity scale.
Figure 4. This is how plots are traditionally oriented. Note that the feather in bezel #1 also breaks through the girdle to the upper half on the left #1 lower half.