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Brilliant_Rock
- Joined
- Jul 30, 2010
- Messages
- 1,308
Big size difference. Nuanced cut differences. Both HPHT grown with blue nuance.
4.12
loupe360.com
6.62
loupe360.com
Rounds this big sit high on my holding tray, so the amount of blue obstruction is exaggerated. The 6.62 is right on the edge of showing leakage under the table. It shows leakage under the table with the slightest tilt, similar to 34.5/41 in Cutwise’s Pa variation for Ca34.5, the 4.12 looks similar to 34.5/40.6. https://cutwise.com/~-bOV
Pardon the lint in my videos
The 4.12 F has white phosphorescence that fades to light yellow and the 6.62 G has light yellow phosphorescence that fades to white. Other than this interesting oddity the color is comparable. In person, the slight increase in crown height is more noticeable than the difference in color.
2.57 E vs 4.12 F vs 2.62 faint blue G for reference
Other than size, the biggest difference to me between them is in the way they handle light. The 6.62 arrows stay more silvery whereas the 4.12 arrows go dark at closer than half arm’s length. With the 6.62, the leakage areas that show up under the table on tilt move as the stone moves, giving the illusion of more contrast and a more lively center. As such, when the arrows are all silvery at full arm’s length, the 6.62 has a slightly more interesting contrast pattern.
Both are attractive rounds with different personalities. Both are capable of generating fire strong enough to necessitate averting my eyes. Setting choice is likely to have a bigger impact on the 6.62 given the leakage areas on tilt.
| Carat | 4.12 | 6.62 |
| Color | F | faint blue G |
| Clarity | VS1 | VS1 |
| Measurements | 10.37 - 10.42 x 6.26 mm | 11.95 - 12.01 x 7.45 mm |
| Depth | 60.3% | 62.2% |
| Table | 58% | 57% |
| Crown Angle | 34 | 35.8 |
| Crown Height | 14.5% | 15.5% |
| Pavilion Angle | 40.7 | 40.7 |
| Pavilion Depth | 43% | 43% |
Loupe360
6.62
Loupe360
Rounds this big sit high on my holding tray, so the amount of blue obstruction is exaggerated. The 6.62 is right on the edge of showing leakage under the table. It shows leakage under the table with the slightest tilt, similar to 34.5/41 in Cutwise’s Pa variation for Ca34.5, the 4.12 looks similar to 34.5/40.6. https://cutwise.com/~-bOV
Pardon the lint in my videos
The 4.12 F has white phosphorescence that fades to light yellow and the 6.62 G has light yellow phosphorescence that fades to white. Other than this interesting oddity the color is comparable. In person, the slight increase in crown height is more noticeable than the difference in color.
2.57 E vs 4.12 F vs 2.62 faint blue G for reference
Other than size, the biggest difference to me between them is in the way they handle light. The 6.62 arrows stay more silvery whereas the 4.12 arrows go dark at closer than half arm’s length. With the 6.62, the leakage areas that show up under the table on tilt move as the stone moves, giving the illusion of more contrast and a more lively center. As such, when the arrows are all silvery at full arm’s length, the 6.62 has a slightly more interesting contrast pattern.
Both are attractive rounds with different personalities. Both are capable of generating fire strong enough to necessitate averting my eyes. Setting choice is likely to have a bigger impact on the 6.62 given the leakage areas on tilt.
Pricescope has been very helpful in my searches over the years and this is my way of giving back. 
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