The antique necklace was made during the Art Nouveau era, It is marked 14k and is solid yellow gold. The piece weighs 5.7 grams and wears as a choker or a young girls necklace. It is 13" long and the extension measures 1 1/2" x 1 1/4". Set in the center is a square shape green natural peridot with an approx weight of .60 cts. The necklace also has many natural pearls.