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 »  Home  »  Diamond Grading  »  Visible Effects of Painting & Digging on Superideal Diamonds  »  Crown-Only Painting - Actual Photos
Visible Effects of Painting & Digging on Superideal Diamonds
by Brian Gavin | Published  12/09/2006 | Diamond Grading
Crown-Only Painting - Actual Photos
These 6 subject diamonds have crown-only painting. They range in ACP from 0.5–6.7 degrees.

Their pavilions have negligible deviations; all less than 0.5 degrees.

All 6 have premium 'ideal,' near-Tolkowsky proportions.

Ranges: D 60.4-61.6, T 54.1-56.9, C 34.6-34.9, P 40.6-40.9, S 50-55, LH 75-78

All 6 display high levels of optical symmetry or 'Hearts and Arrows,' assessed as 'true' or 'near-true' by standards published at this link.

All 6 range in size from 0.71 – 0.76 ct. Their color and clarity range from E-G and SI1-SI2 (with the exception of subject 4 which is I VVS1) on grading documents from the AGS and GIA.

Note: Because of the difficulties inherent in photographing fine distinctions in appearance aspects, the images shown in Photos 1 and 2 may not perfectly match what is seen when the actual diamonds are viewed face up.

Photo 1: Fluorescent lighting, white background. (L-R: ACP 0.5°, 1.5°, 3.3°, 4.0°, 6.2°, 6.8°)

Photo 2: Fluorescent lighting, black background. (L-R: ACP 0.5°, 1.5°, 3.3°, 4.0°, 6.2°, 6.8°)

Photo Compilation 3: Corresponding Ideal-Scope images

Photo Compilation 4: Corresponding ASET images

 

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