Looking for a beautiful gift for that special middle aged woman in your life. I can tell you that there is nothing like or ever will be anything like diamonds. Our personal fave type of jewelry to receive as a gift or give as gifts are bracelets.
We like bracelets because unlike rings finding the perfect size is not an issue. They are far more flexible than diamond necklaces and best of all, we can admire them ourselves as well without having to look in a mirror.
Tennis bracelets are our favorite. They are conservative and classy. Here are a few classic examples from 1 cttw to 3 cttw. You can see the price difference.
Remember it is the thought that counts...so look around.
There are also some very good sites on the web. Some sites let you design your own rings and you can get very good deals. Diamonds on the web is an example of such a vendor.
We love diamonds. All you have to do is find what you think your lady will love to wear and you will love to give. Best of luck.