Two toned silver necklace w/gold overlay on oval pendant, long length, like new

Beautiful necklace with two toned overlapping ovals - long length and can be adjusted 1” longer if desired. See pics for total length with and without extension. A little long for me - worn once, like new. Purchased within the past year in Oia - Santorini, Greece. Sorry - no official detailed description, but was told by sellers this is sterling.