Mayan calendar necklace

Black resin and turquoise color stone inlay necklace with Mayan calendar pendant and heavy duty clasp. Back of pendant section is stamped 935 (which means 93.5% pure silver). It’s has a great patina but will polish up beautifully if you choose Necklace measures 18.5" Twelve (12) oblong necklace links measure 1" long x 5/16" wide Circle of pendant measures 1-5/8" around Three (3) pear shaped drops measure 1" in length 61.2 Grams