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The SweetLine parameter description, information about its calculation and presence in appraisers and reports is presented on the SweetLine page page.
Parameter Usage
Using the SweetLine parameter, you can achieve better optical performance for the solutions. Smaller values of SweetLine would cut out a stripe from the rectangle, potentially enabling the search for favorable solutions over a wide range of parameters. Previously this area could only be covered by a series of smaller rectangles, that is, by running the search multiple times with extremely tightened CrownAngle and PavilionAngle, each time covering a small portion of the stripe. Sweetline offers a less time-consuming alternative to this approach.
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Example
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- Rough Stone
Here is an example of rough stone (0041_4.90ct.Mmd_modern.oxg) with Consider these two sets of Smart Recut solutions obtained from one original using different SweetLine settings. Note that the original stone is a semicut (Sweetline_example_1.oxg).how the tightened setting of SweetLine leads to the improved visual appearance (the "hearts and arrows" pattern) and greater values of light return.
Yellow Flags = SR above solution #1, Modern_Cut with Table EX = [54 60]
Green Flags = the same with SweetLine EX = [-0,3 0,3]
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|  Standard |  NormalOpticalSymmetry |  MediumOpticalSymmetry |  HighOpticalSymmetry |  UltraSymmetry |
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| Original stone | Recut (13. Single - M)18. Semipolished | Series 1 (Default | SweetlineSweetLine = 1,5) | ||||||||||||||||||||||
| Mass | 04. | 41848963 | 01. | 27807662 | 01. | 28738104 | 01. | 28428082 | 01. | 28418074 | 01. | 28418055 | 01. | 28418039 | 01. | 28408018 | 01. | 28397958 | 0.2829 | ||||||
| Optical symmetry | 2.85NA | 8. | 0405 | 26. | 4600 | 4.82 | 6. | 9973 | 67. | 4210 | 67. | 6456 | 7. | 3274 | 7. | 3593 | 78. | 4822 | |||||||
| CrownAngle, PavilionAngle | N/A | 35.69 40.82 | 35NA | 34.69 | 2624 | 35. | 1020 | 6365 | 35. | 0420 41.65 | 35.20 41. | 4665 | 35.20 41. | 4665 | 35.20 41. | 4665 | 35. | 20020 41. | 4665 | 35.20 41. | 4065 | ||||
| Light return | N/ANA | 0. | 9890 | 0. | 9187 | 0. | 8887 | 0. | 8885 | 0. | 9087 | 0. | 9188 | 0. | 910.91 | 0.92 | 89 | ||||||||
| Picture |  NA |
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| Series 2 ( | SweetlineSweetLine = 0 | .5,3) | |||||||||||||||||||||||
| Mass | 01. | 28668020 | 01. | 28407997 | 01. | 28417980 | 01. | 28377953 | 01. | 28307900 | 01. | 28297890 | 01. | 28167817 | 0.2832 | ||||||||||
| Optical symmetry | 25. | 3746 | 25. | 9657 | 45. | 0383 | 46. | 9423 | 57. | 8163 | 67. | 4914 | 68. | 9317 | 9.20 | ||||||||||
CrownAngle, | 35. | 2070 | 4140. | 4685 | 35. | 2270 | 4140. | 0085 | 35. | 2070 | 4140. | 0185 | 35. | 2070 | 4140. | 0185 | 35.20 | 4140. | 0165 | 35.20 41.01 | 34.70 41. | 0601 | 3435.20 | 4140. | 0665 |
| Light return | 0. | 9198 | 0. | 9899 | 01. | 9700 | 01. | 9701 | 0. | 9799 | 01. | 9702 | 0.99 | 0.97||||||||||||
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| Info |
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| Light return is currently not included in HPO reports. It may be obtained via DiamCalc. To open a model in DiamCalc, export it from HPO using File → Export → Diamond to dmc file. |
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| Note that the MaxMass preset is excluded from the comparison |
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Example
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- Semipolished Stone
Below is another an example of a semipolished stone ( Sweetline_example_2 (SL Updated Results).oxg , also a semicut) with with two sets of Smart Recut solutions. Note how the tightened setting of Sweetline SweetLine leads to the improved visual appearance (the "hearts and arrows" pattern) and greater values of light return.
Yellow Flags = SR above solution #2, Modern_Cut with Table EX = [54 60]
Green Flags = the same with SweetLine EX = [-0,3 0,3]
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| Standard | NormalOpticalSymmetry | MediumOpticalSymmetry | HighOpticalSymmetry | UltraSymmetry |
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| Original stone | Recut (13. Single - M)18. Semipolished | Series 1 (Default | SweetlineSweetLine = 1,5) | |||||||||||||||||||||||
| Mass | 1.3736 | 1. | 10311. | 13141125 | 1. | 13321375 | 1. | 12461363 | 1. | 12331318 | 1. | 12291341 | 1. | 12361333 | 1. | 12221324 | 1. | 11881295 | ||||||||
| Optical symmetry | 65. | 3604 | 8.95 | 2.56 | 4.275.97 | 6. | 3094 | 67. | 0136 | 67. | 4361 | 68. | 6815 | 6.96 | 8. | 6343 | ||||||||||
| CrownAngle, PavilionAngle | 33.3435. | 6920 | 15965 | 35. | 2120 41. | 6165 | 3534.20 41. | 6685 | 3534. | 2470 41. | 6145 | 3534. | 5470 41. | 2845 | 3533. | 2570 41. | 4085 | 3533. | 2070 41. | 4635.20 41.46 | 35.20 41.46 | Light return | 85 | |||
| Light return | N/A0. | 8991 | 0. | 880.8891 | 0. | 870.93 | 0. | 9395 | 0. | 9195 | 0. | 9194 | 0. | 9295 | ||||||||||||
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| Series 2 ( | SweetlineSweetLine = 0 | .5,3) | ||||||||||||||||||||||||
| Mass | 1. | 13141304 | 1. | 12151297 | 1. | 12061293 | 1. | 12451277 | 1. | 12461262 | 1. | 12381242 | 1. | 12161.11871212 | ||||||||||||
| Optical symmetry | 25. | 5610 | 26. | 9238 | 36. | 7284 | 5.80 | 6.927.15 | 7. | 0741 | 7. | 4450 | 78. | 3639 | ||||||||||||
CrownAngle, | 35. | 2120 | 4140. | 6185 | 35.20 | 4140. | 0185 | 35.20 | 3140. | 2585 | 3435. | 7020 | 4140. | 0685 | 3435. | 7020 | 4140. | 0685 | 3435. | 7020 | 4140. | 0685 | 3435. | 7020 | 41.0634.65 41.13 | 40.85 |
| Light return | 0. | 8897 | 0. | 980.9897 | 0.97 | 0.97 | 0.97 | 0. | 9798 | 0. | 9899 | |||||||||||||||
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