XD Glad you enjoyed it Cheryl~

Very true initial statement! I’m praying my chrysoprase ring is NOT glass …. Oh please oh please ….

High praise indeed~ thanks

Thanks Mandy~ what a fantastic boost this morning :D

I appreciate your feedback Don. I agree that some glass or other SR gem photos would be an improvement. I think i was more laser focused on showing some examples of how the colours could look different when sampled from the same spot on the stone. If you'd like to reach out to me on Instagram @obscurventure, i'll get you some pictures of dichroscope with some SR stones and glass.

Thanks Marley~ glad to be of service

Welcome to the channel ~ thanks for your kind words.

Glad my work is of service to you~ Cheers.

I'm glad to be of service.

Thanks Patrick~!

Looking forward to it Joris~ Hello back at you from the City of Angels

Thanks very much~ it is indeed tough to keep the camera steady, and also take meaningful shots with such focal lengths. I appreciate that you recognize it XD I'm still striving to do better each time I shoot.

I live to serve ~ more to come :D

My pleasure to serve~

Glad you're enjoying it Christopher~ you'll hear plenty of verbiage that you won't find elsewhere XD

Thanks Sherry ~ I'm glad you enjoy my work. Keep going and it will stick eventually ;)

Thanks Greg

Thank you Nakaam, glad you enjoyed.

Thanks Robert~ To your question: I don't think so, but i'm not a physics instructor. My understanding would be that the stone has pleochroism due to its doubly refractive nature, and if you look from the optic axis, it will seem singly refractive. A singly refractive stone shouldn't somehow become doubly refractive unless it has some ridiculously large doubly refractive included mineral (bizarre but technically possible) or dark wizards are messing with us XD. Again ~ we'd have to check with some of those Ph.D's to really have certainty on this one, but my gut says "no".

Thanks for the fast reply, I was just thinking of the reflections from water example and wondering if the reflections inside the gem could act the same, partly polarising the light reflected back through the scope jusy making a slight lighter/ darker difference. But I think maybe you are correct and it wouldn"t make such a difference. Thanks

@@roberthamblett9619 Let's find the gemological equivalent of the Breaking Bad science teacher and maybe then we will know the truth :D

WOO! Let me enable that addiction XD

My pleasure ~ Dichroscopes are great to have, and inexpensive to acquire :D (got mine on Amazon and it's lovely.)

Thanks, Jamie. I take it as my challenge to make communication as clear as possible.

@@GemologyforSchmucks clear as a precious stone!😂👍

I'm not sure that i've seen pinkish fog. My first inclination is to wonder about the lamp itself.

@@GemologyforSchmucks The blue end of the spectrum is absorbed before the red end.

Hi Neeland, Without knowing more about the stone, I can just guess, but i'll say that UV fluorescence reactions are typically caused by either Chromium or cobalt. Natural and synthetic stones both can have these elements in them, and the intensity of the stone's reaction is usually related to how much of those elements are in the stone. Cheers and thanks for the question

The best thing would be to get a refractive index reading, and then depending on what colour the stone is, the next thing (or even the first) i'd go for would be the spectroscope. Pyrope-almandine and spessartite all have diagnostic absorption spectra

Id suggest going to a database either online or in a book and checking out the characteristics of Taaffeite. We identify gemstones by using these characteristics such as the refractive index and birefringence and testing them with instruments such as the refractometer. Best of luck to you.

Sachi tools sells them on their website, as well as amazon.

Hi Sue ~ certainly, learning about gemology will be the long road to success, and it's not a requirement as long as you have a trusted source. A big part of what I do is source gemstones from the market for my clients. We also have access to gem labs here to get 3rd party reports for significant stones. If you'd like, send me an email at thegemshepherd@gmail.com and we can discuss the details of what you are looking for and the best way you can go about getting what you need.

Hi Johnny, pardon the confusion. The beginning starts with light. A natural source of light such as noonday sun, or certain other substances burning hotly enough will produce full spectrum light. That means that there are all the wavelengths necessary to create all the colours we are capable of seeing. What the gemstone does is filter that light, absorbing whatever wavelengths of light it is able to, and reflecting back to us what the crystal rejects. Some gemstones have different optical axes (doubly refractive stones), so one direction in the stone may absorb some wavelengths differently from another direction of the crystal, giving us a characteristic called pleochroism. So the shortest answer is: no, light does not cause the multiple colours (2 or 3), the way the crystal absorbs the light is what gives us the multiple colours. Thanks for the question and I hope this clears up the issue.

Tool addiction is real ~! beware XD ... but also have fun

I would love to go to East Africa some day. Right now Covid-19 makes that quite difficult though. You're welcome to email me at nazoannagems@gmail.com and I can get back to you when i'm in the office ^_^ Thanks for the comment Asha.

Aw thanks~ glad to be of service.

Thank you for your kind words!~ i'm glad to serve.

Thanks XD Gotta have that extra umphh!~

Yes indeed, it's correlated: scientific progress and understanding only happens in the presence of coffee.

@@GemologyforSchmucks How right you are. Correlation does not mean the same as causation. My favourite example is that among all children, the size of the big toe correlates with their intelligence; the bigger the toe the higher the intelligence as measured by intelligence tests. Does that mean big toes cause high intelligence ? If you say yes I will know you have a small big toe.

@@brianterence3211 I will have you know that my big toe(s) are monstrous! XD JK, i'm not a hobbit.

Thanks ~ i'm glad that my work is of service.

Very helpful video, Peter ❤. In "The Crown" there's a scene where Prince Philip's mother, Princess Alice of Denmark and Greece, now a Nun in Greece, attempts to raise funds by selling her huge Ceylon sapphire surrounded by diamonds. The pawn shop "jeweler", tells the elderly nun no real sapphire is that large. She doesn't argue, but confidently replies, "Test it." Pawn dealer then gets what appears to be a regular pair of glasses and carefully examines the jewel. As he begins to see it may be authentic he takes the sapphire, holds it near his mouth and exhales on it. I am just wondering what information the "technique of exhaling on the stone was supposed to reveal? (The Crown, Season 3, Episode 3 or 4, called "Bubbikins" approx.10 minutes into episode.)