This is a lovely, vintage, french enamel, marcasite and silver (with french silver hallmark indicating a silver content of at least 800 or 80% silver) medal of Our Lady of Lourdes. The enamel is a brownish color.
This is a smaller size (but so sweet) medal which measures about 5/8" in diameter.
The sterling silver chain is a "reverse rope" chain. It is oxidized but not too dark. It measures about 18" in length.