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help with cut between two diamonds


DiamondQuest
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Hello experts, I need some advice with an internet purchase. I can not make a determanation on how well cut the two diamonds are based on pictures and they are already in rings, but they do have Gia reports. Is a well cut diamond based on particular ratios- length divided by width that make it sparkle to the max (as well as polish and symmetry)? If cut is so important to the overall brillance how do you make a great online choice without being able to see true life sparkle? Is there a science to help beyond seeing it first and judging on looks?

Here are the two stones specs. 1.33 ct. cushion modified brillant VS2 FIY 6.01mm x 5.86mm Depth 4.31mm Vg & G Table 65% Depth 73.6%, girdle thin to extremely thick, faceted,crown angles are greater than 40 degrees with even color. The second stone 1.20 ct cut corner rectangular modified brillant cut VS2 FIY 6.30mm x 5.45mm Depth 3.73 Vg &Vg Depth 68.4% Table 65%, girdle thin to very thick with even color.

Is there an issue with the first stone being so deep that it is small for it's size or does depth make it hard for the stone to reflect light to the top? I am trying to figure out which stone will look the best and sparkle, basically they both seem like decent stones. Is one better than the other? Thanks.

Edited by DiamondQuest
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Hello experts, I need some advice with an internet purchase. I can not make a determanation on how well cut the two diamonds are based on pictures and they are already in rings, but they do have Gia reports. Is a well cut diamond based on particular ratios- length divided by width that make it sparkle to the max (as well as polish and symmetry)? If cut is so important to the overall brillance how do you make a great online choice without being able to see true life sparkle? Is there a science to help beyond seeing it first and judging on looks?

Here are the two stones specs. 1.33 ct. cushion modified brillant VS2 FIY 6.01mm x 5.86mm Depth 4.31mm Vg & G Table 65% Depth 73.6%, girdle thin to extremely thick, faceted,crown angles are greater than 40 degrees with even color. The second stone 1.20 ct cut corner rectangular modified brillant cut VS2 FIY 6.30mm x 5.45mm Depth 3.73 Vg &Vg Depth 68.4% Table 65%, girdle thin to very thick with even color.

Is there an issue with the first stone being so deep that it is small for it's size or does depth make it hard for the stone to reflect light to the top? I am trying to figure out which stone will look the best and sparkle, basically they both seem like decent stones. Is one better than the other? Thanks.

This is a complicated question and I'm going to ask Hermann to move it to it's own thread. You'll get better answers if it's not buried under questions that have nothing to do with what you're asking.

 

For starters, fancy colors are not cut to maximize 'sparkle', they're cut to maximize color. 'Rectangular modified brilliant' usually means a long skinny princess and cushion is sort of a pillow shape with a checkerboard kind of pavilion. These are way different looks. Have you seen either stone? Have you seen ANY stones in these shapes? Shopping off of the certs is an important step in this game but bear in mind that the first task is to get what you want. The right price on the wrong thing is no bargain.

 

Your question is an important one. How to make a great online choice is to first choose the dealer. This applies to all diamond purchases but doubly so for fancy colors. Your jeweler is your ally in this process, not the opponent and what you're commiting to is the shipping costs. You're not really buying the stone until you see it, show it to your friends, get it appraised by the expert that YOU choose, etc. Pick someone you want to be doing business with and then use their expertise to help you find a stone (this is basically the same way you find a great diamond shopping with storefront jewelers too by the way)

Edited by denverappraiser
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Short and flippant answers to your questions below. For a longer answer, I don't think I'd say much that is different from Neil's advice.

 

Hello experts, I need some advice with an internet purchase. I can not make a determanation on how well cut the two diamonds are based on pictures and they are already in rings, but they do have Gia reports. Is a well cut diamond based on particular ratios- length divided by width that make it sparkle to the max (as well as polish and symmetry)?

No. L/W is a matter of personal aesthetic preference within very broad ranges. Polish and symmetry will have a minor effect on sparkle as well, but only a minor one (unless you get below "good")

 

If cut is so important to the overall brillance how do you make a great online choice without being able to see true life sparkle? Is there a science to help beyond seeing it first and judging on looks?
Respectively "you cannot" and "no", particularly for fancy colours and fancy cuts - and these are both! Good quality photos and video help, but they have limitations as well.

 

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Is there an issue with the first stone being so deep that it is small for it's size or does depth make it hard for the stone to reflect light to the top? I am trying to figure out which stone will look the best and sparkle, basically they both seem like decent stones. Is one better than the other? Thanks.

Depth is not necessarily an "issue" except that it will make the stone look smaller. However, it may have been cut that way to maximise projected colour, and it may well be a "nicer" stone for that. Is one better than the other? Yes, if you like it more. Otherwise, no-one can say based on the information available (and no-one can tell you which one to prefer in any case!) Edited by davidelevi
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On colored diamonds, it is more about the color of the stone, than the numbers on the stone. They generally are not purchased based on sparkle. Buy the one that you like look of best. #2 will probably look larger. I didn't see any photos of the stones to help you more than that.

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