Archaeologists have uncovered an ancient gold and amethyst ring during an excavation conducted in Yavne, the city that became the center of Rabbinic study after the Romans destroyed Jerusalem. The ring was found in a site dating to the 7th century CE, but it could have originated from a much earlier time.

https://worldisraelnews.com/ancient-ring-with-temple-stone-discovered-in-yavne/