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VERY interesting.How about a rare Type IIa with rare Red fluor?
https://www.gia.edu/gems-gemology/s...less-type-iia-diamond-bright-red-fluorescence
VERY interesting.How about a rare Type IIa with rare Red fluor?
https://www.gia.edu/gems-gemology/s...less-type-iia-diamond-bright-red-fluorescence
It wouldn't surprise me if red phospho was indeed that rare.@Texas Leaguer I remember GIA saying that they have only have about twenty diamonds with orage/red phosphorescence on record (TBD). If you have such an object, it would be possible to detail its properties - resulting in a stack of very expensive paperwork.
We are going to need pictures!
How about a rare Type IIa with rare Red fluor?
https://www.gia.edu/gems-gemology/s...less-type-iia-diamond-bright-red-fluorescence
It wouldn't surprise me if red phospho was indeed that rare.
This thread gave me an idea. We check fluorescence on thousands of stones every year. But we do not, as a practice, turn off the UV after each check to see if there is any residual phosphorescence. I will start doing so on the diamonds I personally inspect and will suggest it to the other gemologists here.
Any interesting finds I will report back!
I thought it was super-cool! When I finally get myself something sparkly (come on, six numbers, that's all I need... lol) I really want it/them to have unusual fluor! A 5- or 7-stone half eternity ring with a range of fluor colours would be awesomeVERY interesting.
This is a great idea!It wouldn't surprise me if red phospho was indeed that rare.
This thread gave me an idea. We check fluorescence on thousands of stones every year. But we do not, as a practice, turn off the UV after each check to see if there is any residual phosphorescence. I will start doing so on the diamonds I personally inspect and will suggest it to the other gemologists here.
Any interesting finds I will report back!
There is a link to a paper in a thread by Denver Appraiser in the Lab Grown Diamonds section of the forum, IIRC (am on the phone so it's a faff to search, lol). I think I'm right in saying that MMDs tend to fluoresce orange more often than other colours, but there was a GIA paper I noticed that covered some unusual nickel-based fluor that was green?!Does anybody know how synthetic diamonds are behaving with respect to fluoro?
You have a great collectionYeah, in my dreams lol. I'd prefer a blue, anyway. My J is the only one I have (besides sidetones) that could even be considered white. The red is pretty, though! I have a sapphire that fluoresces red, but it's not the same thing.
I haven't been able to capture the phosphorescence on camera....not as bright as the fluorescence and my phone just doesn't pick it up. And that's a shame because it really is cool.
.
Top picture left to right: chameleon, green yellow with strong blue (doesn't look so strong here, but see it again in the 2nd picture), intense green yellow with strong green.
Bottom picture (because I didn't get them all in the first): the green yellow again, the intense green yellow again, and the yellow with faint blue.
I thought it was super-cool! When I finally get myself something sparkly (come on, six numbers, that's all I need... lol) I really want it/them to have unusual fluor! A 5- or 7-stone half eternity ring with a range of fluor colours would be awesome
This is a great idea!
I can't remember - do GIA and/or AGS mention phosphorescence on grading reports?
Entirely personally speaking, I think it would be ace if vendors included fluor colour in their listings (as well as the HCA tool), perhaps even highlighting unusual colours
There is a link to a paper in a thread by Denver Appraiser in the Lab Grown Diamonds section of the forum, IIRC (am on the phone so it's a faff to search, lol). I think I'm right in saying that MMDs tend to fluoresce orange more often than other colours, but there was a GIA paper I noticed that covered some unusual nickel-based fluor that was green?!
EDIT: I think this is the thread:
https://www.pricescope.com/community/threads/gia-on-hpht-synthetics-fall-2017.235388/
You have a great collection
Thank you Bryan!!The degree of discount is generally related to the strength of the fluorescence. The pricing of collection goods (DEF IF/VVS) is more sensitive to fluorescence, especially in larger sizes.
Medium fluoro has never been implicated in any potential transparency problems to my knowledge.
I’m obsessed with my D with strong blue, it’s why I bought it. I actually won’t buy a stone again without it. It just seems so much more beautiful in the sunlight and it adds a little bit of excitement. I am going to trade my larger OEC at some point even though it’s very pretty because I want a stone with fluorescence.
Not all strongly fluorescent stones are phosphorescent. It is estimated that around 30 percent of diamonds have some degree of fluorescence Phosphorescence would be a very small subset of that 30 percent.
Phosphorescence does tend to be associated with fancy color diamonds. The Hope Diamond is the most famous example. It's a blue diamond with red phosphorescence!
I will bet you $100 that one carat D, E, F color diamonds with strong to medium blue fluorescence will not sell at a premium as per Rap pricing within 5 years of this date, 7/4/2019.
... question about fluorescence ... as long as we can enjoy an optical phenomena
It wouldn't surprise me if red phospho was indeed that rare.
This thread gave me an idea. We check fluorescence on thousands of stones every year. But we do not, as a practice, turn off the UV after each check to see if there is any residual phosphorescence. I will start doing so on the diamonds I personally inspect and will suggest it to the other gemologists here.
Any interesting finds I will report back!
This is the best question I have seen in a long time...Do you expect this Rap pricing thing to be around? I see two bets: about the recognition of obvious beauty - where pricing has already given reason for taste to assert itself (idiot discount), and about Rappaport's scoping an inflection in its historical data (price incl.). Is this what you mean?
Inquiring minds want to know more about the green yellow with green fluoro.Yeah, in my dreams lol. I'd prefer a blue, anyway. My J is the only one I have (besides sidetones) that could even be considered white. The red is pretty, though! I have a sapphire that fluoresces red, but it's not the same thing.
I haven't been able to capture the phosphorescence on camera....not as bright as the fluorescence and my phone just doesn't pick it up. And that's a shame because it really is cool.
.
Top picture left to right: chameleon, green yellow with strong blue (doesn't look so strong here, but see it again in the 2nd picture), intense green yellow with strong green.
Bottom picture (because I didn't get them all in the first): the green yellow again, the intense green yellow again, and the yellow with faint blue.
Well, stranger things have happened.
And sadly, I've learned not to underestimate my ability to be wrong.
Now, Is this bet based on USD or AUD?
If Garry loses the bet he'll pay Wink in AUD? and if Wink loses the bet Wink will pay Garry in USD?...
5 yrs is an eternity for the diamond market a lot can change. If this bet was for within 3 yrs then I'm on Wink's side, but in 5 yrs? IMO, Garry have an ex chance of beating Wink.
Inquiring minds want to know more about the green yellow with green fluoro.
Interesting diamond!
It's gorgeous!
I believe everything goes in cycles as I believe YG setting will make a come back. Of course you and Garry knows more about the diamond market than I do.Okay, officially I am betting in US dollars. I suspect that Garry is too. And I know he is very close to the diamond world at a much deeper layer than I am, so he may well have a chance to win.
So, if I follow your logic, I should have been making this bet once a year for the past 39 years. If I had found someone to disagree with me that fluorescence will be sold at a discount in five years I would now have collected 34 times. Too bad there was no internet, as we know it today, in 1980. And of course, there was no Pricescope back then.
Wink
3. some 5 years back the A$ was worth more than the US$. now we get 0.70
Yup, I will probably lose the bet, but it will be fun, and it probably means taking some nice people to dinnerReally interesting discussion so far. Put me on the side of the best that doesn't believe fluor will begin selling at a premium again. At least, not for a long time. Anytime a gemologist says "There's a small chance that fluor will impact the transparency of your diamond" the general public hears "Blah blah blah fluor will impact the transparency of your diamond."
What if gemologists start saying "this fluorescent diamond looks whiter in some lighting"
or
"This fluorescent diamond has a top and exceptional transparency rating 9.8 out of 10"
Lovely green fluoro!
What if gemologists start saying "this fluorescent diamond looks whiter in some lighting"
or
"This fluorescent diamond has a top and exceptional transparency rating 9.8 out of 10"
I have long believed, and posted here in discussions about fluorescence, that there should be a way to grade transparency. This would help consumers understand a critical aspect related to light performance that would be relevant not only to fluorescence but to clarity in general. There are a number of transparency reducing characteristics that do not necessarily show in a lab report and are often not obvious to the eye, especially the untrained eye."This fluorescent diamond has a top and exceptional transparency rating 9.8 out of 10"
Not tomorrow, but in the foreseeable future. My kayak needs me, and there are too many redfish on the Texas Gulf Coast. Someone has to do something about it!Wow, I blink and you guys go and have loads of FUN!
1. Bryan did you say you are retiring?
2. the basis of my belief is there is new research and more coming that should largely dispel the gossipy stuff. Probably will take 10 years for the dinosaurs to get it but would be a shame to pass up the fun.
3. some 5 years back the A$ was worth more than the US$. now we get 0.70
4. Syn diamonds identification is aided by fluoro - for example when short wave fluoro is stronger than long wave the diamonds is most probably synthetic
Wow, I blink and you guys go and have loads of FUN!
1. Bryan did you say you are retiring?
2. the basis of my belief is there is new research and more coming that should largely dispel the gossipy stuff. Probably will take 10 years for the dinosaurs to get it but would be a shame to pass up the fun.
3. some 5 years back the A$ was worth more than the US$. now we get 0.70
4. Syn diamonds identification is aided by fluoro - for example when short wave fluoro is stronger than long wave the is most probably synthetic