Really interesting large ring made of carved and polished mother of pearl - leaving a beautiful luster. The center oval cabochon is piece of oval polished mother of pearl with a darker ring underneath most likely made of shell also. The ring has some natural imperfections as found in nature - one side is indented as that was how the founding shell was formed. The cabochon seems to be a little off center but can still be positioned center front on your finger. Wonderful vintage handcrafted ring!