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 » RockyTalky
»  » Round brilliant decision
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Round brilliant decision |
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| P: 7/2/2004 8:23:35 PM | |
slubba Rough Rock Total Posts: 3 Last Post: 7/5/2004 Member Since: 7/2/2004 |
Choosing between two stones: ................Stone#1...............Stone#2 Carat...........1.60......................1.57 Color...........F.........................F Clarity.........SI1...................SI1 Polish..........Ext...................Ext Symmetry........Ext...................Ext Fluores.........None..................None Meas............7.64-7.67 x 4.58 mm.. 7.43 - 7.46 x 4.60 mm Depth...........59.8%.................61.8% Table...........58.0%.................57.0% Girdle..........Thin-to-Med, Faceted....Med-to-Sl Thk, Faceted Culet...........None..................None Both are especially clean SI1's with small light feather not-to-surface outside of table. Also, under lightbox, they are indistinguishable shades of "F" color. Stone #2 is a deeper cut and looks noticably smaller due to smaller diameter. Which is the more perfect cut? Both are GIA certs. I am told 58% Table is a smidge large on Stone#1 but that Stone#2 is a smidge deep due to steepish crown angle (35 deg). What do the pro's think? ... I'm thinking about this way too much... - slubba |
| Posted: 7/2/2004 8:23:35 PM | |
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There are 7 replies to this message. There are 7 replies on this page. |
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| P: 7/3/2004 10:11:55 AM | |
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elepri Ideal Rock Total Posts: 759 Last Post: 5/6/2006 Member Since: 6/29/2004 |
I"m far from a pro but if you have the crown and pavilion angles, you can plug them into the cut advisor that will give you an idea on how the stones will perform. I think you may also get more feedback from the pros once you have that information.
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| Posted: 7/3/2004 10:11:55 AM | |
| P: 7/3/2004 11:47:06 AM | |
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slubba Rough Rock Total Posts: 3 Last Post: 7/5/2004 Member Since: 7/2/2004 |
I only have AGS measurements on Stone #2 (Sarin / AGS) AGS ct 0 Crown is 35.0 / 15.3% Pavillion is 40.7 / 42.7% Table 56% culet 0.9% girdle 1.5% I notice a column of "0" next to each item except diam and depth. Stone #2 is stunning (both are)... it does have slightly darker center. Wish I had the AGS on the other...
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| Posted: 7/3/2004 11:47:06 AM | |
| P: 7/3/2004 3:15:27 PM | |
Magnum Cut Rock Total Posts: 342 Last Post: 7/28/2004 Member Since: 3/26/2004 |
I wouldn't worry about the table on the first stone, or the depth on the second stone. Both are just fine. As was already pointed out, the angles are actually more crucial to the light performance of the stone. The second stone has nice numbers. The crown angle is slightly big, but still well within the ideal range and should be ok especially with combined with a 40.7 pavillion angle. It's definitely a benefit to be able to compare the two side-by-side, just make sure that you do the comparison in different types of lighting (outside/inside, etc.). Assuming they compare similarly in all types of lighting, then it seems to me the only other difference would be the size of the first stone, so why not go bigger assuming all else equal. (Is the price the same?) One other thing to think about. Part of the reason the first stone is bigger is that it has a slightly smaller girdle (although the second is still in ideal range), so no big surprise there. The other reason is that the first stone could have shallower angles than the second, also causing it to be a little larger in diameter. This is just a guess, so take with a grain of salt, but the smaller depth on the first stone could suggest slightly shallower angles than the second, suggesting that the first stone will show slightly more briliance but less fire, while the second will show slightly more fire but less brilliance (this could also explain why the second looks a little darker in the middle). The good thing is, you're actually able to look at them with your own eyes and make that determination, which is far better than any speculation i could make. If neither one jumps out at you, and they both have equally good "sparkle" (light return), then I say go with the one with the bigger diameter. Best of luck in your search. 
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| Posted: 7/3/2004 3:15:27 PM | |
| P: 7/5/2004 1:04:45 AM | |
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slubba Rough Rock Total Posts: 3 Last Post: 7/5/2004 Member Since: 7/2/2004 |
Great advice... exactly what I did (bigger stone)... before I read your response... btw, side by side you were right about fire/brilliance... i don't know you, but you seem to know your cuts... thanks for the support!
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| Posted: 7/5/2004 1:04:45 AM | |
| P: 7/6/2004 8:58:48 PM | |
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Magnum Cut Rock Total Posts: 342 Last Post: 7/28/2004 Member Since: 3/26/2004 |
No problem, I'm glad it worked out for you.  It sounds like you got a great stone. And I'm definitely not a cut expert by any stretch of the imagination, but thanks for the complement. I'm just an interested consumer, just like you and a lot of the other people that post here (most people are consumers, but we are lucky to have several experts that continue to teach us and contribute whenever they can). And like most of the other non-experts that post here, I was so grateful for the information I learned here that I decided to stick around and try to pass it on to others in similar shoes. Best of luck.
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| Posted: 7/6/2004 8:58:48 PM | |
| P: 7/6/2004 9:48:24 PM | |
Rhino Ideal Rock Total Posts: 4,861 Last Post: 11/21/2009 Member Since: 3/29/2001 |
35/40.7 vs an unknown? I'd take the 40.7/35 anyday.
Rhino |
| Posted: 7/6/2004 9:48:24 PM | |
| P: 7/7/2004 3:26:48 PM | |
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Magnum Cut Rock Total Posts: 342 Last Post: 7/28/2004 Member Since: 3/26/2004 |
Rhino, I agree with that, but in this case I'd make the argument that it's not an "unknown." If this person were comparing two stones that were listed on the internet, and hadn't seen either, I would totally agree with what you said, and strongly advise against buying the one without the angles listed until at least some more information is known. But in this case, the person is comparing the stones side by side, so the cut of the stone really isn't unknown. Maybe the exact proportions that the stone was cut to are unknown, but the end result, the beauty of the diamond, is not. And its not like he doesn't have a good stone to compare it to, so the argument that his eyes just don't know what to look for isn't as strong as it is in some other cases. The proportions of the other stone are in the ideal range, and if the "unknown," larger stone looks the same, if not better, then it's hard to argue with that. Buying stones site-unseen on the internet is a different story, and one in which getting as much information about the cut of the stone is one of the most important tasks to buying on the internet. And being somewhat of a cut freak and anal shopper, I'd want to know all the measurements on the diamond even if I wasn't buying it site-unseen, no matter how good it looked. But that's not true for all people. I'll give this analogy. Buying a diamond is a little bit like buying a painting. You're buying something for it's aesthetic properties. Some people will look at the technique of the artist, and how precise his brush strokes are, and other technical aspects of the painting in evaluating how beautiful it is. Other people will just look at the painting, and if it's something that brings them joy, well, then that's all they need to buy it and hang it on their wall. Different strokes for different folks. I think we need to be careful when giving advice, because in my opinion, there are slightly different considerations, and different pitfalls, when buying a stone in a B&M vs the internet. The internet is a great resource, but the biggest downside is that you're buying site-unseen, so you need to counter that by getting as much info as you can to maximize the chance of getting a great looking stone. While getting info about a B&M stone is still important and should definitely not be discounted, it's not as critical when buying in a B&M as it is on the internet. That's just my two cents, and something I think needs to be kept in mind.
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| Posted: 7/7/2004 3:26:48 PM | |
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