This one is a beauty. The high quality onyx stone is 3/4", surrounded by sterling marcasite for a total width of 1 1/4". The height of the pendant, including the bail, is just over 1 1/4". The piece weighs a solid 12.3 grams and is marked NF 925 Thailand. (The NF stamps indicates it was made with true sterling silver.) The bail opening is 4mm. The pendant's nostalgic beauty is enhanced with a 17" vintage rope chain, weighing 8 grams with a width of 3.2mm (1/8 inch), and is stamped 925 Italy. Excellent pre-owned condition. Own a piece of the past.