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I'm late to the party 
Was C 'the chosen one' in the end?
Personally speaking, I like it the most out of the three options in the A/B/C pics
I do like ECs a lot, but there does seem to be many that are all-on/all-off, which means that perhaps 50% of the time you will see a dark stone.
If you can get a stone which has some steps off when some steps are on (so creating contrast patterns and, in turn, increasing the relative brightness of those steps that are lit up, if I understand the science correctly) you should have an interesting stone to look at all the time
It seems like C does this, which is great!
Some leakage is not necessarily a bad thing, though, as I understand it - if it is just one or a few facets scattered around the stone, I think it can kind of act the same as obstruction/contrast, in that the brighter steps around it might look relatively brighter as a result, and the leakage/obstruction patterning overall can be attractive if done well.
Yoram's Asscher stones, for example, do show some leakage on the ASETs I've seen posted, but are they ugly? Er... No!!!
The 'windowing' thing is perhaps an extension of the leakage thing - in that not all facets will work at all angles, so some might go 'leaky' and/or 'window' at some angles. It seems that pears and ovals often have the 'far side' go see-through when rotating (on JA videos) and quite a few ECs have the triangles at the bottom of the short ends go see-through, but if the overall look of the stone is still attractive, I don't think it's necessarily the end of the world (and Karl has even questioned if the EC 'leakage' is just facets not having any light to reflect due to the lighting setup, rather than being 'leaky').
Referring again to Yoram's asschers, find Jimmianne's 'Mildred' thread and check out the tilted ASETs that Yoram has posted (and maybe even in Matthew1127's 7-stone band thread??) - you will see there that the stone(s) show leakage/'windowing' of some facets at some angles, but it's only a facet or two within the rest of the facets that are reflecting, so it doesn't look bad, it just creates visual interest!
Anyway, I am no expert and the above is just my understanding of how things work so I am happy to be corrected if/as necessary! lol
FWIW I think the C stone looks great and I can't wait to see it set
Was C 'the chosen one' in the end?
Personally speaking, I like it the most out of the three options in the A/B/C pics
I think that what you are describing here is that sometimes ECs can be 'all-on/all-off' - either completely bright or completely dark - if they are not cut to collect light from a range of directions at a range of tilt angles.
I do like ECs a lot, but there does seem to be many that are all-on/all-off, which means that perhaps 50% of the time you will see a dark stone.
If you can get a stone which has some steps off when some steps are on (so creating contrast patterns and, in turn, increasing the relative brightness of those steps that are lit up, if I understand the science correctly) you should have an interesting stone to look at all the time
It seems like C does this, which is great!
Lol. C is the one that I wanted all along but it does have that leakage where someone mentioned seeing thru it. UGH. Now I do see that. I wonder if certain settings will make it less noticeable? I LOVE the shape. I LOVE the steps. The color is “fine”. It’s the only one w out FL
Don't forget that (as I think has been mentioned) diamonds resting on another surface (such as your fingers) changes the refractive index of the touching facet(s), which means they can show leakage that is not there when mounted in a ring
Some leakage is not necessarily a bad thing, though, as I understand it - if it is just one or a few facets scattered around the stone, I think it can kind of act the same as obstruction/contrast, in that the brighter steps around it might look relatively brighter as a result, and the leakage/obstruction patterning overall can be attractive if done well.
Yoram's Asscher stones, for example, do show some leakage on the ASETs I've seen posted, but are they ugly? Er... No!!!
The 'windowing' thing is perhaps an extension of the leakage thing - in that not all facets will work at all angles, so some might go 'leaky' and/or 'window' at some angles. It seems that pears and ovals often have the 'far side' go see-through when rotating (on JA videos) and quite a few ECs have the triangles at the bottom of the short ends go see-through, but if the overall look of the stone is still attractive, I don't think it's necessarily the end of the world (and Karl has even questioned if the EC 'leakage' is just facets not having any light to reflect due to the lighting setup, rather than being 'leaky').
Referring again to Yoram's asschers, find Jimmianne's 'Mildred' thread and check out the tilted ASETs that Yoram has posted (and maybe even in Matthew1127's 7-stone band thread??) - you will see there that the stone(s) show leakage/'windowing' of some facets at some angles, but it's only a facet or two within the rest of the facets that are reflecting, so it doesn't look bad, it just creates visual interest!
Anyway, I am no expert and the above is just my understanding of how things work
so I am happy to be corrected if/as necessary! lolFWIW I think the C stone looks great and I can't wait to see it set
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