Hi David !
Thank a lot for this great answer ! Appreciated !
1. We (and possibly you) know nothing about the cut of the diamond, other than symmetry being graded good - and that's not a good place to start. Can you see the diamond and compare it to others? Alternatively, can the vendor provide you with good quality photos and ideally a video?
Actually I saw the diamand with her last monday but at this stage, I did not know about fluorescence and what to check with it. He just insisted about the flawless and the D color Therefore, I did not think about asking other questions and specifically, I could not see well though the UV if it was blue or not. I couldn't compare as well to other diamonds as it brought only this.
2. The report is over 15 years old. This is not necessarily a problem, but: A) has the diamond been sitting for 15 years in a retailer's safe? If so, is it because there is something wrong with it? Or B} has the diamond been sitting on somebody's finger for 15 years, in which case is it still "flawless"? It takes very very little to have a tiny chip or scratch that makes that "flawless" grade go away.
Wow did not pay attention to that ! He told me that the bought this diamond recently because it was a nice deal according to him. So do you think, he bought it 15 years ago ? Or he bought it recently but has been analysed 15 years ago ?
Do you suggest that it's better to do a new analysis ?
3. The reason why the fluorescence has a negative impact on price is that sometimes it makes stones go cloudy or oily in natural light. This may or may not be the case here, but if it does not everybody likes the effect. Did you ask the vendor?
As I told you before, I did not pay attention to that as I did not have the knowledge. So my fiancee tried the diamond, said it's really nice but I don't know if she paid attention to that as well (she was excited etc)
The price is reasonable, and one reason why it is so "cheap" compared to other D/IF 1.0x pears is very clearly the fluorescence, but the polish and symmetry grades contribute too. Take a look through this list of nearly 150 comparable diamonds for Weight/Clarity/Colour and see what happens to prices when you filter for fluorescence, polish or symmetry...
My fiancee told me that I can buy this to get more money by selling it as it may be a nice diamond and then buy aanother one smaller, but with everything you told me before, I'm not sure that it will be easy. What do you think ?
The price being reasonable is one thing, but the real question is whether this is the right diamond for you (her). Buying something just because it's at a sensible price is normally not a good strategy.
Do you (does she) actually want a D/IF? Or is it because you fear that something else will be looking yellow and/or with visible inclusions? If the latter is the case, please be assured that an H/VS2 (and even an I/SI1) in this size will look white and with no visible inclusions.
She told me that she just want something nice and good quality but by seeing this diamond, she told me that it can be a good deal...
Initially she was up for a 0.75ct, D-E/VS1-VS2. Something that can be brillant and white.
So D/IF is not really mandatory.
Similarly for the pear shape - and the cut is a huge variable on which we know nothing but is more influential on looks than all the others we have mentioned.
It is not mentioned in the GIA report ? How can I know about it ? Jut by looking ?
Thank a lot for taking time to answer my question ! I really appreciate it.