What are your references for the Anglo-Saxon finger rings? I am studying them at university, and am collecting as many as I can find. I have seen a few that you have posted, but others, such as the one with the Roman intaglio, I have not seen.
Most of the “Ancient World,” “Ancient Europe,” and “Middle Ages” jewelry that I post is from the ancientpeoples tumblr, which is a really great source. I believe it’s run by graduate students who are interning at the British Museum. Sometimes I come across things from other blogs, but mostly it’s from them. The post that you’re referring to is one of those oddballs from somewhere else, though. I reblogged it from inkfromtheoctopus, so you might want to send her an ask as well.
I tried reverse image searching the picture and came up with some things that might help you out with your research in general. The Pinterest pages can be useful if the pin has a source attached, such as a museum website. Unfortunately, many of the instances of the Intaglio ring on Pinterest are actually pinned from my blog, or don’t have a source! So not much help there, but they have a variety of other rings as well:
Flickr Page for the Roman Intaglio Ring (still no academic reference but there is some more info from the poster that could be helpful)
Okasha, Elisabeth (2003). “Anglo-Saxon Inscribed Rings.” Leeds Studies in English, n.s. 34, pp. 29–45.
I hope this is helpful!