It's a chain made with 18K yellow gold. 
This jewel is genuine Made in Italy.

. Metal: solid 18K Gold
. Length: 40 cm (15.75 Inches)
. Width: 1 mm (0.04 Inches)
. Weight: 1.1 grams (0.04 ounce)
. Supplied with box, shopper, warranty and invoice of our jewelry 
. Price : $ 115.00

The chain has printed the mark of the gold fineness 750 (which is the Italian equivalent of 18k) and that of the producer.

Please control well the measurements of the chain before making an offer, because it is a very pretty chain, but thin, not big.