0. Normal Indexing : Values nominal
1A. Crown-Only Painting to 6° : Values Nominal
1A. Crown-Only Digging to 6° : Reduction in light return
2A. Pavilion-Only Painting to 6° : Major Reduction in contrast
2B. Pavilion-Only Digging to 6° : Reduction in light return
3A. Crown & Pavilion Painting 6° : Major reduction in contrast
3B. Crown & Pavilion Digging to 5° : Severe reduction in light return
Crown & Pavilion Digging to 11° : Reduction in light return. Severe reduction in contrast.
Crown Painted to 11°, Pavilion Dug to 11° : Major reductions in light return and Contrast.
Crown Dug to 11°, Pavilion Painted to 11° : Major reductions in light return and Contrast.
