Vintage PIETRA DURA Micro Mosaic Flowers 10k Gold Pendant 18” Chain

I purchased this piece from a fine jewelry store. I was told that it was from early 1900’s. Many pieces from that time were not marked. It tested 10k for the pendent and chain. I am not sure of the clasp. One piece of inlay fell out and it was colored in white. Some dent on the side. There is marking but ineligible. It is still a lovely piece. It weighs 13 grams all together. Sold as it. The gold is guaranteed. Will ship with insurance.