Pearl Bracelet. What is this supposed to show?
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Pearl Dreams
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Looks like akoyas (looking at overtones).
StarryPearl
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Why say it seems very important?
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LorenLL
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Pearl Science Laboratory use the same setup (black background with diffused white light at the bottom) as a standardised way to observe the aurora effect a.k.a. interference colours. The strength and colour pattern of aurora effect is believed to be correlated with nacre quality and lustre, and it is one of the criteria for a pearl to be certified as hanadama. Source
The "aurora effect image" gives you some idea on the colour and the richness of the overtone in normal situations. Basically, the colour of the overtone IRL is the opposite of the colour shown in the bottom half (illuminated by white light), and the more vibrant the aurora is, the more visible the overtone becomes even when observed under other lightings.
As for the pearl strand in your post, it looks like the aurora is pretty weak, with a few pearls showing a slightly stronger green and/or pink tint, which means the strand would mostly be in a uniform white/light pink colour.
The "aurora effect image" gives you some idea on the colour and the richness of the overtone in normal situations. Basically, the colour of the overtone IRL is the opposite of the colour shown in the bottom half (illuminated by white light), and the more vibrant the aurora is, the more visible the overtone becomes even when observed under other lightings.
As for the pearl strand in your post, it looks like the aurora is pretty weak, with a few pearls showing a slightly stronger green and/or pink tint, which means the strand would mostly be in a uniform white/light pink colour.
Wow! That really does tell a lot about the pearls! Thank you so much LorenLL!!! So people can more accurately tell the color & matching (assuming I remember how that works)...It also helps me spot the roundness more easily. I am still laughing about the photo...if I needed an expert's help...how much does it really tell the average buyer???
LorenLL
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Aurora effect is also observable on some South Sea pearls and Tahitian pearls, with the rainbow gold SSP and peacock Tahitians showing the most striking colours.
Gold/White South Sea pearl:
Tahitian pearl:
Note: the same aurora colours are visible at the bottom half of the pearls even when a desk lamp is used. It is because the light reflected from the white surface acts as a secondary light source illuminating the bottom. If you look closely at the white SSP, you can see the pink overtone around the reflection of the lightbulb.
But the bottom-lit photo looks so cool and professional
LorenLL Laughing, It might look cool and professional to other professionals...to the "average" buyer it is just confusing. But I certainly learned lots and that is why I put this up... I can see that the desk lamp is really useful, while people who don't know won't be totally confused. They will just think it is a nice photo. I will try that for several pearls that I am confused about.
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