Diamond Cut Study
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Study of Interdependence:
Fancy-color Diamond Appearance, Cut, and Lighting Conditions
Fancy-Color Diamonds:
Better Color Appearance by Optimizing Cut

1 Content
2 Color optimization method
3 Diamond absorption spectra
4 Two representations of colors
5 A good fancy colored diamond should be bright and saturated
6 Color potential of a colored diamond plate
7 DiamCalc ray tracing options and photorealistic images
8 One spectrum different cuts and different lightings
9 Process flow
10 Exploring rough diamond potential
11 Rough allocation example
12 Different allocation plans
13 Automatic color optimization
14 Optimization by color
15 Optimization by contrast
16 Optimization results
17 Computer-aided color optimization
18 Expert considerations
19 The final stage: expert decision
20 Verification of the technology: CZ material
21 Real photos of CZ stones and photorealistic images based on Helium scanned 3d models
22 Verification on fancy shapes CZ
23 Summary
24 More information about diamond cut study technologies
25 Terms of colorimetry science (Hunt, 2004)
26 Acknowledges
27 References
Computer modeling of gemstones for improvement of their color appearance
Visible adsorption spectra and DiamCalc-files of colored gem materials
3DBook
DiamCalc Internal Cuts gallery
External Cuts gallery (Dll)
Diamond cuts gallery
 
Expert considerations

For best computer predicted proportions, color appearance is checked visually with diamond photorealistic color images in different lighting conditions.

Top Row:Plan 1
Oval 5.11 ct
Download Oval demo small size (DiamCalc DMV Video) 22,8 Mb
Download Oval demo large size (DiamCalc DMV Video) 71,5 Mb
 
Bottom Row: Plan 4
Radiant 5.04 ct
Download Radiant demo small size (DiamCalc DMV Video) 22,8 Mb
Download Radiant demo large size (DiamCalc DMV Video) 71,5 Mb

Office (Black background) Dialite (Black background) Dialite (15 tilted up)
 
 
27.84 0.52
 
 
31.85 0.18
 
 
34.05 0.18
 
 
24.66 0.59
 
 
34.25 0.21
 
 
35.16 0.18

After the optimized proportions are fixed for each shape, these shapes are optimized to fit in the piece of rough. Some stones became smaller, other - bigger. In this example after this stage only two shapes remain: oval and radiant. One can compare both by DC photorealistic images and by color metrics.

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