Designer Square Necklace with a Black Onyx Pendant, Wide Chain, Double Curb Chain, 925 Silver, weight 28.69 grams, chain length approximately 50 cm, link width 6 mm, pendant dimensions 25x25 mm, hallmarked in Gdańsk after 1986 Markings: on the reverse of the pendant, a 925 hallmark and an oval manufacturer’s mark, likely AVM. Condition: as shown in the photos.