Rockdiamond|1453239780|3978152 said:Serg|1453212542|3977863 said:David,
Seems you missed my main statement about color in ovals.
"Softer white"=yellowish would be fine if color has uniform distribution in diamond crown pattern. Uniform "Softer white" color can be even invisible , specially in yellow gold settings .
The problem is the unevenness in color pattern due different length path's for different cut parts. Oval cuts usually have such unevenness in color pattern. it become easy visible for I colors and it does not looks nice.
also it does some oval parts more dark, less brilliant. You would easy see it in comparison with better colors.
HI Serg,
I think we probably agree than many- or even most ovals are not very well cut. The reason I feel our locations may impact the type of advice we'd give is that we may see very different types of oval diamonds on a daily basis. IMO "usually" does not matter to any single specific diamond.
I have found some lovely OMB's in I-K colors- the nicest ones do not show an uneven color.
Based on the the shape of an oval, when you superimpose the Brilliant Pavilion design from a round ( OB), you're going to have main facets on the pavilion that vary widely in terms of shape and size. The different sized pavilion mains may also cause unevenness in color. Because of this aspect, sometimes the OMB design can produce a more even result.
Another aspect of this discussion that I find to be very important is that if we accept the fact that any oval diamond of I-J color is not worth considering ( which I do not), we're eliminating some viable candidates.
Same thing with ASET and the limitation of it.
If ASET imagery causes viable candidates to be eliminated, then consumers are pushed into higher colors, or smaller stones for their budget.
I-J color is not for everyone, but some people prefer it to a D
Hi David,
Technically there are not any problem to receive OMB with uniform color. There are many oval designs for fancy color diamonds that produce nicely uniform color .
but if cutter use such design for "I" color oval ,he usually can not receive any profit.
1) OMB Lab grade from Pavilion is typically worse than for OB( from same rough). for example "K" color instead "I" color
2) From crown the diamond looks as L-P color
3) VF's are small ( too small for "colorless" diamonds)
4) for some types of spectrum the crown color would be too dark. Yes there are rough with good spectrum that creates opportunity for bright oval with inform "warm color" if a cutter use good fancy color cut design. But to often a cutter will receive "dark brownish color" instead "warm white". Most cutters have not technology to select cut depends from rough color spectrum . without special technology the risk is to high, profit is to small and very rare. if he use such technology then expenses to high in compare with Oval "K" color price per carat .
I prefer " K" color oval with uniform color instead "I" color oval with uneven color, "white bowtie", ..
but such choice is not profitable for cutters.
sometimes you would see nicely cut P-T Ovals with uniform color due cutter mistake! a cutter selected fancy color oval design, because he expected to receive Fancy light color. He lost money, you received nice oval with uniform "white warm" color. wrong market, weak color grading system.