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 »  Home  »  Diamond Grading  »  Visible Effects of Painting & Digging on Superideal Diamonds  »  Appendix D.  Enlarged ASET Comparisons
Visible Effects of Painting & Digging on Superideal Diamonds
by Brian Gavin | Published  12/09/2006 | Diamond Grading
Appendix D.  Enlarged ASET Comparisons
1A. Crown-Only Painting: No reduction in performance occurs under the table.  There is gradual impact along the girdle but this is not visible until 6-7° degrees occurs (increased greens).

1B. Crown-Only Digging:  Reduction in performance begins when digging to 3°.  Girdle facets fall off in performance especially fast (severe greens).


2A. Pavilion-Only Painting:  Visible effects are notable once 4° is passed (increased greens) and significant darkness under the table appears after 7° (severe blues).

 

2B. Pavilion-Only Digging:  Reduction in performance under the table even at 2° (severe blues).  Girdle facets fall off in performance especially fast (severe greens).

3A. Crown & Pavilion Painting:  The visible effects are notable once 4° is passed (increased greens) and significant darkness under the table appears after 7° (severe blues).

3B. Crown & Pavilion Digging:  Reduction in performance under the table even at 2° (severe blues).  Girdle facets fall off especially fast (severe greens).

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