Beautiful Mexican Diamond and Blue Topaz Oval Pendant /10 Carat White Gold / Circa 20th Century

I had posted this a few months ago. I finally got around to taking it to the jewelers along with a few other pieces that I thought might have potential. I was very surprised to find out that the outside frame is composed of twelve tiny single cut diamonds set in 10k white gold . It is marked 10K and I knew that it was gold, but diamonds...really !! The chain is also very fine and 10K white gold. The center larger stone is possible a blue topaz but he wasn't a 100% sure. The whole pendant is about the size of a penny but oval. I was floored because I only paid a couple dollars for this ! My little silver rings I posted earlier also turned out to be rubies, opals, and freshwater pearls. Even the itty bitty .08 carat diamond and gold engagement ring was a flawless stone ! None of these are worth huge amounts because of their size but a couple hundred here and there can really add up. I'm amazed !! -Mike-