Fluorescent Diamonds and Emeralds

In this video, I'm showing how anyone with even a cheap UV light can make some interesting discoveries within their own gemstone and jewelry collection. After I received my light in the mail, it kept my kids and I occupied for several hours testing various gemstones and minerals to see what would fluoresce and what wouldn't. It was fun!
Thee UV Lights are great for classroom learning or hobbies can come in packs of 10 here:
amzn.to/3nudLJa
Specifically I am demonstrating how well natural diamonds can fluoresce as well as different types of man made emeralds versus a natural emerald.
I Use the GIA as a regular resource whenever I am looking for well documented information on a specific type of gemstone, or even more specific articles such as he one I referred to about diamonds and fluorescence. You do not need to be a jeweler or gemologist to read their articles on their website.

[@cardinal4896]

The best video in KZbin about the fluorescent of diamonds! This video really helped me out, thank you very much!

[@earthartgems]

Thank you!

[@ZairaMartinez1]

Wow, I was so sad because my Diamond was fluorescent and I thought it was fake. I looked for an explanation on KZbin and learned something new. Thank you, I can sleep better now.

[@earthartgems]

You're welcome! Yeah, its actually more common than most folks realize :)

[@user-tw8io5bw5f]

Although there are some diamonds that is not flourescence (rarely) but almost natural diamonds are fluorsescence under UV longwave.

[@loisruthstrom8143]

I'll have to get one of those lights! It looks like fun!!! 👍😄

[@venkataraokurumoju595]

VERY GOOD INFORMATION 👍 SIR

[@jasminenwhitaker9717]

Thank you for sharing

[@earthartgems]

You are most welcome, and thank you :)

[@tonyaosier624]

I have a purple stone that glows green with the uv light. I also have a blue stone that glows green too.

[@hasnaaplus6996]

I like that show❤

[@lemondedespiecesdemonnaie9441]

Greetings to you, my friend on KZbin. Thank you. Why did the large emerald stone give a red color and the other green stones did not give you a red color? thanks

[@lemondedespiecesdemonnaie9441]

Please, what is the color of a diamond when it is exposed to ultraviolet rays? Thank you

[@Roy_AEWFan]

You should get a natural diamond with Type IIb diamond, phosphorescent glows without Flourescent of using UV light. Phosphorescent has premium. I like your Diamonds they are beautiful with Flourescent and I respect your emerald gem too.

[@munhyeon8323]

One question, my necklace have a diamond in it and when i shine a UV light on it, it turns purple and not blue as u showed, what does it mean?

[@earthartgems]

It means that it has a strong fluorescence, where as mine had a medium blue. they can also show green, yellow and white.

[@troponick]

An interestng video. However, some natural emeralds do fluoresce red under UV. I recently bought an emerald-in-matrix specimen from Afghanistan, and the emerald crystals fluoresce a very obvious medium red under a LWUV torch. These emeralds are high in chromium and very low in iron, hence the fluorescence.

[@kikiBOMBOMm]

Hello, I understand that of all emeralds, only the one that shone red was real ?? I have an emerald, 11cts, when I put it under UV light, its top reflects a delicate purple and its color is green unchanged. Is it real or fake ??

[@earthartgems]

Many synthetic or lab created emeralds will fluoresce red, the rough emerald cluster in this video is a lab created rough emerald. Rarely, a highly saturated natural emerald will fluoresce purple. This does not prove it is natural though, but in general, it is a good sign. If you really want to find out, I suggest sending it to a Laboratory, like GIA for analysis.

[@kikiBOMBOMm]

@@earthartgems my emerald kzbin.info/www/bejne/lWavqaR4rpyHlZI what do you think??

[@Muonium1]

You'll probably want to invest a little more, maybe $30-$50, in a true UV light source like a Convoy S2 UV flashlight with a ZWB2 filter. The difference is absolutely dramatic. The light you have here is emitting around 395nm which is really just at the very edge of the UV range and has a very wide spectral bandwidth of FWHM around ~30nm, whereas a good Nichia diode source like the Convoy with a notch filter in front will be an exceptionally pure and intense (you must wear UV blocking eyeware when using it - it's so intense it scares me almost as much as laser sources) source of 365nm radiation with a FWHM bandwidth of only ~10nm. It's totally wild looking at things around the house, minerals, plants, etc. with a source like this because the UV is so truly invisible the only thing you're seeing is isolated fluorescence. It will also be powerful enough to excite phosphorescence in the diamonds, which a 400nm never will. Highly recommend getting one.

[@earthartgems]

Thank you, You're totally spot on, A better UV light is on my wish list... but Santa didn't get me one this year... sigh...

[@davidsaintjohn4248]

This is still LWUV yes?

[@Muonium1]

@@davidsaintjohn4248 by the strict definition of anything under 400nm, yes. but that cutoff is obviously artificial and arbitrary. 395nm photons from a light like the one in this video simply don't have enough energy to excite fluorescence the VAST majority of materials which exhibit this property. you need 365nm or lower and it needs to be filtered to eliminate visible radiation from the diode or mercury tube.

[@davidsaintjohn4248]

@@Muonium1 agreed. I have a dual source from UV tools but if you know of better please share! 🙏💎🌈

[@Muonium1]

@@davidsaintjohn4248 depends on what you need it for, but for fluor minerals I recommend filtered LED based lights for both near and far UV. For near UVA at 365nm any of the now generically available "C8" style lights for sale on any of the big online outlets will do. I recommend the $35 "WKDUN C8 365nm 5W UV Flashlight Torch" on amazon as the best light output for the price, and you can read my review on the item page there. For far UVC at 256nm your choices for intense LED sources are much more limited and there are probably at most 4 people selling these at the moment with Engenious Designs being the most reputable. Be prepared to shell out ridiculous $$$ for a UVC LED source, the AlN diodes are still cutting edge, very inefficient, have low manufacturing yield, and are expensive as hell. An 11w mercury tube like you have will work somewhat of course, but has very dim and diffuse output after the wood's filter. I also have an 11w Hg tube source, but it's a totally unfiltered germicidal bulb because I'm mainly interested in things like phosphorescence, cryoluminescence, and tenebrescence, which are observed after the excitation source is turned off anyway, and I want all the deep UVC I can get out of it, including the superdeep vacuum UV line light at 185nm. The Terlingua calcite phosphorescence under this radiation for example is spectacular.

[@Khriebei29]

I just bought ultraviolet diamond tester keychain from Amazon and I tried in few of my rough stones collections and i find them all under the tester looks like in purple in the dark 😫

[@earthartgems]

What is an ultraviolet diamond tester?

[@Khriebei29]

@@earthartgems yes it says so which I bough it from.amazon India as ultraviolet diamond tester key chain

[@earthartgems]

@@Khriebei29 So is it just an ultraviolet light like the one I use in the video? If so, it just shows if a diamond as fluorescence. There are not that many minerals that do fluoresce.

[@MellowMaromi]

Only 25-30% of diamonds are blue under blacklight, and it lowers the value of the diamond (which I find ridiculous, I love the ones that glow).

[@Nothing19800]

Don’t forget the ones that GLOW IN THE DARK!!!

[@earthartgems]

Hmm, what minerals emit their own glow without UV Light?

[@LettyFlo]

I'm confused

[@user-hg2yk2vb6q]

Hi

[@GiacNgoLuanHoi]

Tôi có viên đá rất lớn phát huýnh quang dưới tia cực tím , nó có phải là kim cương không

[@earthartgems]

Fluorescence is not an indicator of a stone being a diamond as there are many stones that do display fluorescence. It is merely an interesting characteristic.

[@mauricio4131]

bathe your nails don't be dirty....

[@xNecromancerxxx]

Okay, so basically, what you just showed me was an extremely inconsistent test… this doesn’t help me at all… why did you even make this video?

[@earthartgems]

It's not a "test" its just something fun you can do with a cheap UV light. A lot of mineral collectors love to check to their stones under UV lights and these diamonds and emeralds are not commonly thought of as florescent. That said, It is a "test" of sorts one can perform amid many other in a full gambit of tests to try to ID a stone, but it is in no way a definitive way to ID a gem.

[@xNecromancerxxx]

@@earthartgems yeah, I found all that out… after watching this video, I did some research… I always thought that UVR was the best and most effective way to test gemstones to find out if they are nature grown or lab grown… My assumption was the natural earth grown diamonds, rubies, emeralds, etc are fluorescent and the lab grown ones aren’t… so, in a way, your video taught me a whole lot, it made me do a lot of research and learn everything I could about gemstones… lol XD so thanks! 👍🏼

[@earthartgems]

@@xNecromancerxxx It's all about asking the right questions, which is pretty much summed up in your username :) Glad to help! And you're right, there is no consistent connection between lab diamonds vs naturals for their fluorescence. In fact, fluorescence is something that is always referred to on GIA reports because it varies so widely among natural diamonds, it is like a marker or characteristic in an individual stone. But there are probably a lot of other videos out there that get much deeper into that subject.