blueMA
Brilliant_Rock
- Joined
- Aug 10, 2005
- Messages
- 1,257
I've recently purchased two diamonds for a pair of earrings.
I took a chance with the 41 pavillion angle after a lot of research, and decided on a vs1 triple excellent GIA stone with excellent H&A pattern:
0.70 carat, F, VS1
58 table
61.0% depth
33.5 crown angle
41 pavillion angle
43% pavillion depth
50% star length
75% lower half
3.5% girdle
florescence: none
clarity characteristic: Cloud, Needle
HCA advisor: 1.2, AGS chart: excellent
I later paired the above stone with the following SI1 stone with the same width:
0.71 carat, G, SI1, GIA tripple excellent
56 table
61.8% depth
34 crown angle
15% crown height
41 pavillion angle
43% pavillion depth
50% star length
80% lower half
3.5% girdle
florescence: none
clarity characteristic: Feather
HCA advisor: 1.4, AGS chart: excellent
When I initially received the stones, I loved them and congratulated my research/choice because they initially looked almost identical with naked eye and performed very similarly in most lighting situations with a lot of fire and scintillation while facing up bright. I knowingly deviated with the shallower angles and steeper pavillion than Tolkowsky's theoretical 40.75 and 34.75 ideals, but the stones are beautiful with the VS1 stone showing slightly less colored beams but throwing more white light while looking bigger from a distance. The observable differences in the light performance, however, are very minute and barely noticeable.
I was just about to have them set, but then I noticed the VS1 stone looking oddly cloudy in direct sunlight. The SI1 stone looks very similar to my H&A e-ring stone in that it goes dark with mirror reflection under singular light source, but the VS1 stone almost looks milky white under direct sunlight or spotlight. This is driving me crazy, and after pouring through these forums for answers to no avail, I decided to finally give up and ask the forum experts who may help explain this phenomenon. Is this a problem with some microscopic gaining issue in the crystal structure of the VS1 stone or it simply the shallow crown cut reflecting direct harsh light differently?
I would also love to hear from the owners of BIC stones with shallower angles if this is what they notice in their bright stones.
Except in harsh lights, the stone is crisp, bright, and beautiful with virtually no inclusions that can be detected. Here are some photos:
In the sun (looks more milkier and hazy in person):
Indoors - not great shots but they have great symmetrical hearts and arrows with virtually no light leakage under idealscope. The VS1 stone on the left with all shots.
I took a chance with the 41 pavillion angle after a lot of research, and decided on a vs1 triple excellent GIA stone with excellent H&A pattern:
0.70 carat, F, VS1
58 table
61.0% depth
33.5 crown angle
41 pavillion angle
43% pavillion depth
50% star length
75% lower half
3.5% girdle
florescence: none
clarity characteristic: Cloud, Needle
HCA advisor: 1.2, AGS chart: excellent
I later paired the above stone with the following SI1 stone with the same width:
0.71 carat, G, SI1, GIA tripple excellent
56 table
61.8% depth
34 crown angle
15% crown height
41 pavillion angle
43% pavillion depth
50% star length
80% lower half
3.5% girdle
florescence: none
clarity characteristic: Feather
HCA advisor: 1.4, AGS chart: excellent
When I initially received the stones, I loved them and congratulated my research/choice because they initially looked almost identical with naked eye and performed very similarly in most lighting situations with a lot of fire and scintillation while facing up bright. I knowingly deviated with the shallower angles and steeper pavillion than Tolkowsky's theoretical 40.75 and 34.75 ideals, but the stones are beautiful with the VS1 stone showing slightly less colored beams but throwing more white light while looking bigger from a distance. The observable differences in the light performance, however, are very minute and barely noticeable.
I was just about to have them set, but then I noticed the VS1 stone looking oddly cloudy in direct sunlight. The SI1 stone looks very similar to my H&A e-ring stone in that it goes dark with mirror reflection under singular light source, but the VS1 stone almost looks milky white under direct sunlight or spotlight. This is driving me crazy, and after pouring through these forums for answers to no avail, I decided to finally give up and ask the forum experts who may help explain this phenomenon. Is this a problem with some microscopic gaining issue in the crystal structure of the VS1 stone or it simply the shallow crown cut reflecting direct harsh light differently?
I would also love to hear from the owners of BIC stones with shallower angles if this is what they notice in their bright stones.
Except in harsh lights, the stone is crisp, bright, and beautiful with virtually no inclusions that can be detected. Here are some photos:
In the sun (looks more milkier and hazy in person):
Indoors - not great shots but they have great symmetrical hearts and arrows with virtually no light leakage under idealscope. The VS1 stone on the left with all shots.
Last edited:
at least on the pictures. But if you don’t, it’s is probably best just to return it and get a new one.
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