In Roman times it was very frequent the use of these gems in rings, whose use within society was recognized as a privilege that differentiated free people from slaves.
The engraving of the gems was carried out mainly in the manufacture of jewels, in rings especially. But the it were not only used on this support, but also use as amulets, whose possession protected the owner from various ills and diseases, and in many cases was deposited in the tombs, to protect the person even after his death.