Thank you for the reassurance. I think providing photos and some videos of what I like will hopefully set the tone for a positive end result. I'm so excited for this project to get going. It's been moving a long very, very slowly. But now I think the ball will get rolling and I'm starting to feel more comfortable with what my likes/dislikes in OEC's are!No, there are no good parameters for OECs except what GIA provides for what defines an OEC (not going to help though because
doesn't mean its going to make for a pretty stone).
OECs must meet 3 of the 4 criteria. However, I think there are guidelines when picking a Round Brilliant to have cut into an OEC to look
for. Like making sure you have a high enough crown angle. DK is pretty good at providing customers what they like/want so I'll
assume that he's going to find you a stone that you like.
Like ideally all three of these pavilion mains (arrows you could say) wouldn’t be dark at the same time. But it could just be a weird angle. In person though if they go dark all at once like this in person then that area of the table will just look less lively and somewhat dark.
This is @HS4S_2 new transitional cut, a true antique. See how the central facets are all sort of chaotically lit up and no two beside each other are dark and certainly not three adjacent. Now these are different cut styles and your lab OEC has a weird combo of modern and antique that doesn’t typically exist in reality, but this here is the ideal to create a very lively stone that will never go dull or over dark under the table. There is some obstruction at 9 0’clock, you can’t avoid it in any diamond and old cuts especially are more prone, but it’s minimal and doesn’t detract in any way from its beauty.
It sounds like you love it, which is totally fine, but since this is PS and we are centered around cut quality and I think it’s important to make informed choices about the pros and cons of particular diamonds, I do think it’s important to point out that this diamond has similar obstruction issues that I was talking about in another thread with someone considering a similar old style cut. That is not desirable from a cut perspective and it’s something many of us have written a lot about when evaluating old cuts..
You can see it in this still from the video and it is also apparent in the moving video. It would be good to see it in person to see if this others you. Basically half the under table area will go dark sometimes at some angles. Ideally these pavilion mains would turn on (reflect light) or off (reflect dark) in an alternating or random pattern not in clusters like this.
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