Ladies Solid Silver & Aventurine Pendant Choker Necklace

Ladies solid silver and aventurine gemstone pendant choker necklace. 42cm to 47cm in length. The pendant, possibly moss agate, is 9.5cm tall. Stamped 925 on the clasp and the heart tag. Also an anchor stamp on the heart tag, which means this is a Birmingham piece. The pendant and the heat tag are both stamped with the maker's mark, which is a G inside a heart inside a diamond shape. Good preowned condition.