These chunky Mother of pearl signet rings are made of titanium steel and 18K Gold & White Gold filled.
Titanium steel can hold up well to regular wear without deteriorating. 18k gold-filled finish means a much thicker coating than normal jewelry.
These rings are water-resistant. It won't turn your skin green, but to keep the color lasting longer, I would avoid wearing it to shower or swimming.
-Material: 18k gold-filled/White gold filled; titanium steel -Water-resistant -Hypoallergenic