AGS fluorescence: negligible… but I see bright blue?

[Garry H (Cut Nut)]

Diamonds in general respond more to 395-400nm than 365nm they are in the exception mentioned in the article.

Correct for blue fluorescenct diamonds.
Nojos
can you photo on black please

 

[nojs]

Correct for blue fluorescenct diamonds.
Nojos
can you photo on black please

Diamonds on black surface? Or just the pink fluorescence one? I already tried it on it’s own just holding it from the chain and it definitely glows pink. But I try to get the 365 nm torch to compare.

I can try to photograph it today again.

 

[Garry H (Cut Nut)]

Diamonds on black surface? Or just the pink fluorescence one? I already tried it on it’s own just holding it from the chain and it definitely glows pink. But I try to get the 365 nm torch to compare.

I can try to photograph it today again.

A matt black surface with no ambient light will get the best results.

 

[nojs]

I also found this old thread:
https://www.pricescope.com/community/threads/phosphorescence-not-as-rare.272728/#post-5109903

Same as with the OP of that thread, the pink one doesn’t have phosphorescence. I can’t “charge it up”.

I’m so much looking forward to finding myself a 365 nm torch to compare results.

Fluorescence and phosphorescence are the coolest features ever and they make me love these little rocks even more.

 

[Garry H (Cut Nut)]

I also found this old thread:
https://www.pricescope.com/community/threads/phosphorescence-not-as-rare.272728/#post-5109903

Same as with the OP of that thread, the pick one doesn’t have phosphorescence. I can’t “charge it up”.

I’m so much looking forward to finding myself a 365 nm torch to compare results.

Fluorescence and phosphorescence are the coolest features ever and they make me love these little rocks even more.

None of the torches will be 365nm.
Ones like this that cost way more might be about 380nm

365nm UV Torch Portable USB Rechargeable LED Flashlight Pet Urine Detector | eBay

Find many great new & used options and get the best deals for 365nm UV Torch Portable USB Rechargeable LED Flashlight Pet Urine Detector at the best online prices at eBay!

www.ebay.com.au

 

[Garry H (Cut Nut)]

the cheapies create a better effect anyway

 

[nojs]

Diamonds in general respond more to 395-400nm than 365nm they are in the exception mentioned in the article.

But wouldn’t this still apply:
The 395 nm LED emits a pronounced violet-colored light, while the 365 nm LED emits a dull, bluish-white light (the result of residual light energy that "tails" off into the visible spectrum).

 

[Karl_K]

But wouldn’t this still apply:
The 395 nm LED emits a pronounced violet-colored light, while the 365 nm LED emits a dull, bluish-white light (the result of residual light energy that "tails" off into the visible spectrum).

yes, sorry about that, I was responding to another part of it.

 

[nojs]

None of the torches will be 365nm.
Ones like this that cost way more might be about 380nm

365nm UV Torch Portable USB Rechargeable LED Flashlight Pet Urine Detector | eBay

Find many great new & used options and get the best deals for 365nm UV Torch Portable USB Rechargeable LED Flashlight Pet Urine Detector at the best online prices at eBay!

www.ebay.com.au

Sorry are you saying the the OP of that thread likely used a cheap 395 nm torch (which I agree with) or that I’m not likely to find a proper 365 nm UV light without spending a fortune?

 

[nojs]

yes, sorry about that, I was responding to another part of it.

Is this the reason GIA is using 365 nm (if I remember correctly from earlier in this thread)?

 

[oldcutclubmember]

I’m the OP of that other thread and I actually JUST bought this supposed 365 nm last week out of curiosity. The results were actually very similar unless this isn’t actually 365 nm like they claim.

https://www.amazon.com/gp/aw/d/B08VNLSR11?psc=1&ref=ppx_pop_mob_b_asin_title

 

[oldcutclubmember]

Also, since I made that thread, I have acquired a GIA “faint” and a GIA “strong blue” diamonds. The “faint” is actually quite blue under UV (I would not describe as faint… more like medium) and the “strong blue” is even more blue. My “strong blue” does look blue on bright sunlight. I love it lol The “faint” looks whiter in bright sunlight but not blue.

 

[Garry H (Cut Nut)]

Sorry are you saying the the OP of that thread likely used a cheap 395 nm torch (which I agree with) or that I’m not likely to find a proper 365 nm UV light without spending a fortune?

yes and yes

 

[Garry H (Cut Nut)]

Is this the reason GIA is using 365 nm (if I remember correctly from earlier in this thread)?

GIA have never openly declared they changed to 385nm but its in all their patents and I believe they may have

 

[Garry H (Cut Nut)]

I’m the OP of that other thread and I actually JUST bought this supposed 365 nm last week out of curiosity. The results were actually very similar unless this isn’t actually 365 nm like they claim.

https://www.amazon.com/gp/aw/d/B08VNLSR11?psc=1&ref=ppx_pop_mob_b_asin_title

very little chance - may be 385, but unlikely to be 365nm.
One of my friends has a spectrometer and the type I posted minutes ago is 385nm but sold as 365nm

 

[Garry H (Cut Nut)]

these get the very best effect but are dangerous:

pen### | eBay

Remove the batteries when not in use, put the child is not easy to get a place! 2 x Safety Key. 1 x Laser Pointer 303((battery not included)). • Size: 117(L)X20(D) X20(D).

www.ebay.com.au

 

[nojs]

A matt black surface with no ambient light will get the best results.

 

[Garry H (Cut Nut)]

try pointing the UV light from an oblique angle so there is no so much of the bright background> Get closer with phone if you can?

 

[nojs]

GIA have never openly declared they changed to 385nm but its in all their patents and I believe they may have

So if I buy the one you linked from Amazon or even a more expensive one titled for professional use I should get similar results as they get in GIA?

 

[oldcutclubmember]

It’s so frustrating because the phone camera does NOT capture what I see with my eyes.

Two top pics are the stones on my fingers (faint is set into a ring, SB is in a stone holder). The bottom two pics are on a matte black surface. None of these pics really show what I see with my eyes. I don’t know why it’s looking green in some of these pics because it’s all blue to my eyes. Also the phone camera I think goes nuts trying to capture the BRIGHT blue from the SB one lol

 

[nojs]

Also, since I made that thread, I have acquired a GIA “faint” and a GIA “strong blue” diamonds. The “faint” is actually quite blue under UV (I would not describe as faint… more like medium) and the “strong blue” is even more blue. My “strong blue” does look blue on bright sunlight. I love it lol The “faint” looks whiter in bright sunlight but not blue.

What color grades do they have from
GIA? Just curious

 

[oldcutclubmember]

these get the very best effect but are dangerous:

pen### | eBay

Remove the batteries when not in use, put the child is not easy to get a place! 2 x Safety Key. 1 x Laser Pointer 303((battery not included)). • Size: 117(L)X20(D) X20(D).

www.ebay.com.au

I got little kids and they point flash lights in their faces so I’m not gonna get this one despite my curiosity LOL

 

[Garry H (Cut Nut)]

So if I buy the one you linked from Amazon or even a more expensive one titled for professional use I should get similar results as they get in GIA?

possibly, however I believe the information from the cheapest is more relevant because that type of UV is all around us and passes through windows etc

 

[oldcutclubmember]

What color grades do they have from
GIA? Just curious

Faint and strong blue

 

[nojs]

It’s so frustrating because the phone camera does NOT capture what I see with my eyes.

Two top pics are the stones on my fingers (faint is set into a ring, SB is in a stone holder). The bottom two pics are on a matte black surface. None of these pics really show what I see with my eyes. I don’t know why it’s looking green in some of these pics because it’s all blue to my eyes. Also the phone camera I think goes nuts trying to capture the BRIGHT blue from the SB one lol

Incredibly cool! Do they have phosphorescence as well? If so, what colors and how long to you charge them with the light?

I’m mesmerised by these cool effects

 

[nojs]

Faint and strong blue

I meant the letter (D-Z). Because I was thinking if nitrogen is causing fluorescence (I read this from internet but I’m not sure if it is true) shouldn’t lower letters fluorescence more. Yet this doesn’t seem to be the case.

I’m also very curious if the trade members know if there is any studies done on phosphorescence?

 

[nojs]

try pointing the UV light from an oblique angle so there is no so much of the bright background> Get closer with phone if you can?

I tried this. I can’t capture the pink properly on my phone but my eyes see it.

 

[Karl_K]

It’s so frustrating because the phone camera does NOT capture what I see with my eyes.

That is expected unfortunately.

 

[oldcutclubmember]

Incredibly cool! Do they have phosphorescence as well? If so, what colors and how long to you charge them with the light?

I’m mesmerised by these cool effects

Yes, they do… once again, very frustrating because the glow stays a lot longer to my eyes than what the camera can capture but I just took this video thinking it may be easier to see. I charged them for like 10-15 sec? Not long at all. I imagine if I charged them for longer, the glow will stay longer. SB on top and Faint on the bottom in the video. I feel like perhaps the GIA N Faint appears to phosphoresce yellow because it is an N and has a yellow hue to start with?

 

[oldcutclubmember]

I meant the letter (D-Z). Because I was thinking if nitrogen is causing fluorescence (I read this from internet but I’m not sure if it is true) shouldn’t lower letters fluorescence more. Yet this doesn’t seem to be the case.

I’m also very curious if the trade members know if there is any studies done on phosphorescence?

Ah, sorry! Misunderstood. Faint is a GIA N and SB is a GIA J. They are both genuine old mine cuts.