Mom necklace silver

Silver, not marked but doesn't tarnish or do anything strange to skin. New in box. I've had them packed up for about 10 years and I've worn one off and on for 10 years with no problems. My mom wore hers on vacation, in ocean and in shower with no problems. New only, not our used ones. Adjustable chain 15 1/2 to 18 inches. Pendant is about 1 inch across. White topaz stones.