YTA, NTA, or ESH?

NTA but is your friend correct about the ring?
From your writing style it sounds like you are in middle earth, I know a traveling jeweller in that area that can appraise it for you and if it truly is a problematic ring they can take it.

ESH
Your uncle clearly misappropriated property not belonging to him.
By accepting it as a gift, you are now an accessory to the fact.
Old friend of yours is asking you to participate in destruction of property, doesn't matter how small or valueless it seems it's not yours to keep discard or destroy... You should be trying to find the rightful owner and returning said item.
These things while seemingly insignificant hold great value and meaning to their owners. I know this cause I'm a jeweller and I've had customers tell me how precious their jewellery can be.
Source: Am a Jeweller.
- ESH? Everyone's a Shit Head?
  
  Essentially, yes. As I understand, it stands for Everyone Sucks Here.
  
  Everyone's Sauron Here
  
  In case you don’t actually know and I’m not being whooshed, it means Everyone Sucks Here
- I know this cause I’m a jeweller and I’ve had customers tell me how precious their jewellery can be.
  Source: Am a Jeweller.
  oh thank god, i was worried you might be a jeweler for a second.
- I'm curious how you can tell it's stolen, could it not be some ethical issues with slave mining or political issues with the company executives?

i could've sworn frodo was 33
- Bilbo was 111, and Frodo was 33 during the birthday party when Bilbo left the Shire.
  Only 17 years later, when he's 50, does Frodo go off on the Quest to destroy the ring.
  I'm making my way through the books right now and I haven't seen the films in ages, but if I recall correctly it's much less clear in those that there was a time skip. Which yea if I were adapting a book I'd also skip the bit where JRRT says "and then nothing of importance happened for 17 years, apart from the fact Gandalf was travelling to do research about the ring and kinda went missing recently".
  
  That's all very fascinating, and thank you for clarifying that for everything.
  But I need you to shut your lying mouth with that 17 years nonsense. I am 33. I am in way 17 years from 50 years old. Shut up. Shut up and stop talking your heinous lies.
  
  People getting all out of shape about the age of the hobbits whereas Gandalf was created at the beginning of time, which is much older than 2019 years old. That's likely the age of his current physical manifestation, but his spirit is truly ancient.
  The Universe in Middle earth is about 55,000 years old, but that's stated to be created after creation, so Gandalf was created before that.
  
  It's kind of hinted at when Gandalf comes back and asks "Is it secret? Is it safe?" Frodo has to go looking for the ring and clearly hasn't thought about it in a while.
  
  And it’s that scene from Fellowship that we will get probably another trilogy squeezed out

YTA precious you shouldn't haves that ring gives it to me and I will dispose of precious properly

NTA. You are under no obligation to help other people cancel some jeweler who's probably dead now anyway. Enjoy your ring and fuck the haters.
- NTA. The jeweler may have had a politically incorrect past, but the times have changed and so have the people. Why not go seek the jeweler and have a frank conversation about their current principles, and then make an informed decision?
  
  Exactly! Those "problematic associations" are just elvish propaganda because the elves don't agree with the traditional values the jeweller stands for.
  
  Henry Ford was a literal Nazi and people still buy his cars.

One does not simply post on AITA.

Also, "2019 M"? Your close family friend is over 2000 years old? Is the close family friend Sauron?
- Olórin/Gandalf, though he'd be older than that. Someone down thread said a little over 3000
  
  Lotrproject - Timeline
  If you go by Gandalf's age as a Maia in general, he'd be as old as the world. So, roughly 10,000 years, if you don't account for the fact that the Years of the Lamps and the Years of the Trees were longer than a standard year.
  If you go by when he showed up in Middle-Earth as Gandalf the Grey in year 1000 of the Third Age he'd be 2018 at the time he confirms Bilbo's ring is the One and confronts Frodo about it in year 3018 of the Third Age.
  Gandalf The Grey would have been 2019 years old when he was mutually slain by Durin's Bane after falling from the bridge in Khazad-Dum.
  Gandalf The White then first appeared a few months later and would be only two years old at the time he sails west with Frodo, Bilbo, Galadriel, and Elrond.
- More importantly, is it time to have a that age gap discourse conversation?

Are there mobile 111 year olds?
- It's not uncommon for some folks to live well past 120, but I hear OP's uncle is exceptionally spry for an older feller. Almost looks like he hasn't aged a day in the last 60 years.
  
  Definitely looks well-preserved.