Gem-A Live: Man-made Stones Explained
Вставка
- Опубліковано 22 чер 2020
- Man-made stones explained, will walk you through the various definitions of what the terms artificial and synthetic mean. Gem-A guest lecturer Julia Griffith FGA DGA discusses the manufacturing processes and identification features for synthetic ruby, sapphire, emerald and diamond.
This lecture goes into detail on:
- Terminology for artificial and synthetic
- Manufacturing processes
- Identification features
- Synthetic ruby
- Synthetic sapphire
- Synthetic emerald
- Synthetic diamond
This webinar was created as part of a weekly series of webinars known as Gem-A Live.
This session was brought to you in association with jewelleryadvisor.com.
Thank you Julia for uploading it on UA-cam!
Fascinating, what a great series of lectures! Could we please get one on the other synthetics not detailed here (alexandrine, quartz and spinel in particular)? Thank you!
A very large topic excellently condensed and smartly presented , Thanks Julia. `Great series! F
Great vid! Translated about 10% understood 100%!😄
Thank you, very informative and simply put!
Enjoyed the lesson, thanks for sharing. Derek
I'm your new sub. I'm glad I found your channel. Very well presented and explained. I appreciate that!
Hi Mam thanks for explaining so nicely I like all your topics in Gemmology taken by you thanku so much
Thank you very much for information and depicting beautiful presentation style and especially smile.
Explained Beautifully....appreciate.
Thanks very nice explained 👍
You are the best ..thank you toooooo much
veryinformative thank you
Thanks a lot madam 😊
For gems information
This is such a great channel. It has helped me a lot with extra studying down here in Australia. And wow Julia, it feels like having Brigitte Jones teaching us :) :). You are very like her!
Thank you for sharing
on the "quartz is used in technology" that kinda means all technology. while there are other ways, using a quartz crystal resonator is a cheap and extremely precise way of generating a clock signal for electronics, so basically everything you recognize as electronic will have one or several quartz crystals in it. phone, fridge, car, tv, tv remote. basically everything more complicated than a lightbulb may contain one.
Thank you very interesting
Hi Julia what do you think of the Gemetrix jewellery inspector for testing Hpht/cvd diamonds?
Is there a shop in London where I can take my crystalsbto check for genuinity?
Do you know where to certify diamond
From what I’ve understood in my studies, Cubic Zirconia does exist in nature. However the crystals are very small and only found in tiny amounts, nothing suitable to be available for the gem and jewellery trade.
Nice stone
The distinction between natural and synthetic gems primarily hinges on perceptions of value that are somewhat illusory. A high-quality lab-grown ruby, for instance, created using the flux method, will typically surpass its natural counterpart in terms of crystal symmetry, color consistency, and the absence of structurally significant inclusions. Conversely, it is unlikely for anyone to admire a natural ruby with a large feather that breaks the surface of the table and express appreciation for what they might perceive as a charming flaw. These imperfections are not delightful natural signatures; they are defects, and aficionados of jewelry should not have to tolerate them.
In this context, the valuation of natural gems is upheld in a manner akin to cryptocurrency. Once a critical mass of individuals comes to recognize that the advantages of synthetic gems outweigh those of natural ones in every aspect except for a fortuitous perception of rarity, the value of natural gems could plummet, akin to any investment predicated on erroneous beliefs. The fur market serves as an apt illustration of this phenomenon.
Is there a chemical added to ruby's and sapphires to make them glow a different color under UV light? and what is the chemical?
Hi - it's not that chemicals are added to affect fluorescence. Rather that rhemicals are added to affect the colour of the gem. To rewind - Ruby and Sapphire are both corundum (aluminum oxide). Pure aluminium oxide is colourless - add chromium to make it red = ruby, add iron and titanium to made blue = blue sapphire. Chromium is a fluorophore and causes fluorescence. Neither iron nor titanium are fluorophores thus no fluorescence :)
@@TheGemAcademy I would love to learn what other gemstone elements are fluorophores. A basic search online doesn't provide any particular listing other than dyes and compounds. Also, based on the significance of chromium, would it be safe to say that fluorescence could be used to isolate Emeralds colored by chromium vs. those colored by vanadium? Thanks in advance!
would hellenite be considered artificial?
Thank you very informative. And also you’re really cute ❤️.
Is Chatham Emerald a synthetic Gem?
@Rolly Yes it is!
YES absolutely - "Chatham" refers to the producer (based in the USA)
Legally they settled on the term "created".
What is the lacture name? Can i get her email?
Alchemist.
Good morning
I had to chuckle when she felt the need to correct herself just for using the term "Man."
Great video but the audio quality is SO poor and the volume is too low, even at the highest setting on the website and my laptop. That microphone needs to be closer to you or, alternatively be replaced with a headset type mount. As you move back and forth away from the microphone, the fluctuations are way too wild and drastic. Without a silent house, which is practically impossible, the video loses value. Yes, I've had my ears checked, tyvm. Accent is definitely not a factor. Please change the microphone set up and/or settings. Thanks!
see a hearing specialist because there is no audio issues here.
It’s spelled COLOMBIA 🇨🇴
ASMR...MMMMMM
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sounds like if one wanted to sell a synthetic gemstone as a real one, they just need to do a really poor job of synthesising it with lots of impurities and poor coloring :)