welcome to the world of zbrush jewellery. nice to see more of us coming out of the wood work. for a first post this is great:D. the only advice/critique i can offer is to look at how you’ve cut the details in. a lot of the art of this kind of thing is in creating detail that will survive polishing. which i find is only achieved by making sure every detail is over cut/ counter cut much like a die sinker. so like where there’s a ridge you cut deep running up to it. or visa versa.
that being said it looks like your already doing this quite well. but as Ive found to my cost. on screen is one thing in hand is another. the only other thing i can suggest is the fuzzy texture in the area around the faces on the signet ring is probably best put in post cast with an air hammer that way you get a much cleaner finish.
also with the settings you’ve built you’ll need to make sure when you come to put them into production they are much longer so the setter has something to rub over the stone. they could also do with being a little bulkier. alwase talk to whoever is setting the stone before production as generally (and they are finicky b******s) the setter will want it a certain way to make sure its secure.
just remember. its easy to take metal off its a pain to put it back on.