Wow! That must have been some topaz ring!
That's sadly a gemstone you don't hear mentioned often these days even though it is far more beautiful than citrine and many other popular stones. Seems like one heard about topazes often in the 1950s and '60s. My mom wore a perfume called Topaz which came packaged with a beautiful faux topaz on the bottle or jar.
But I rarely hear the stone mentioned much these days.
Enjoy your lovely pendant! I love the enhancer clip. I had never seen one before. Is that something that is easy to find?