So my Dad found this in his garden at Sledmere, Yorkshire, UK. We think it might be roman because he said there have been a few other roman things found there.
After some research we think the stones might be radiated quartz.
Anything is appreciated, cheers
TBH it doesn't look that old. If it is Roman it would have been in the ground for 1600-1700 years at a minimum, meaning it would have to be made of solid gold to not deteriorate. Also, it looks nothing like the "typical" Roman bracelet, which is an unbroken ring of gold that has an opening at the top to allow expansion when putting it on.
This is much more likely a piece of costume jewelry that is under 100 years old. If a green patina is visible it is almost certainly made of copper plated in gold.
You may have more success in /r/whatisthisthing/
A few questions :
How far deep did he dig?
How big was the radius of this excavation?
What tools did he use and what was his intended purpose of digging?
Given just what you've posted here it looks like a 1920s-1940s piece, although those linked bracelets haven't really gone out of style since the 20s so it could easily be 1980s or newer.
The big tip off that it isn't Roman is the cut of the stones. That style of facetting gemstones didn't really arise until the late medieval/early Renaissance. Roman gems would either be polished smooth or carved, or cut more crudely
This is not Roman - the cut gems are much more recent. But that doesn't mean it has no archaeological value! I would recommend you get in touch with your local portable antiquities scheme contacts. They will be able to identify and - importantly - record it so future researchers will be able to use it to add to our knowledge of the past. Once they've looked it over, they'll allow you keep it.
Learn how to contact the portable antiquies scheme - and why reporting finds is important - here: https://finds.org.uk/getinvolved/faq
