Shell statement necklace

Beautiful shell necklace. Two strands with multiple circular shells hanging from them. Shells are dime and nickel sizes, approximately. Shells are brown and beige on one side and iridescent pale green on the other. Chain is silver tone, approx. 17"-19" long with 2" drop. Excellent used condition. Dresses up a solid color dress or top. There is no tag bit I remembered buying from Express.