The vintage era is basically a whole century, this is why there are so many different styles that we call vintage.
In each decade of the retro times fashion changed and this can be observed if we examine garments but also if we take a closer look at jewelry. Some of the vintage jewelry can be relatively easy to find and they are also affordable, however some of the older pieces are much more rare. For example finding a ring from the 20s and 30s can be very hard.
Vintage diamond rings from the 30's are unique, they are very elegant and sophisticated looking, and a lot of people dream about having such a ring. The only problem is that since they are so old they are hard to find, but fortunately not impossible.
Some of the rings from the 30s are quite simple, as this was the time of the Great Depression and most people didn't have money to afford fancy rings.
Such rings have only simple decorations and they are usually made entirely of one type of precious metal and without any gemstones. On the other hand the Victorian style was still very popular in the 30s, with romantic looks, floral patterns and filigree decorations.
Most of the rings were made of metals such as sterling silver, platinum or gold, and sometimes you can find rings decorated by small gemstones as well, and even diamonds. Edwardian style rings were also made in the 30s, being very similar to the Victorian style rings but maybe a bit more elegant and fancy.
If you set your mind on a vintage diamond ring from the 30s look for an online auction, because those are the best places if you don't have such a big budget. Be prepared to pay a lot of money for it, since such rings are very valuable. You can find the best deals on Ebay.