Silver CZ earrings

A lovely pair of silver earrings. The stones are Cubic Zirconium (CZ). These earrings have not tarnished in all the years Ive had them. They are very elegant and would make a great pair of everyday earrings or an understated bit of glitz. Disclaimer: I do not know what kind of metal this is. There is no .925 Sterling silver stamp. They could be stainless steel, or something else but I do not know. I cannot tell you if they’re hypoallergenic either.