18K necklace, 3.43g. Appraised at three precious metal specialty stores. Please refrain from purchasing if you are sensitive to used items, as it has been stored by a non-professional. Returns and complaints are not accepted due to the value of the item. Thank you. Measurement was done at a precious metal specialty store. The photo is blurry due to amateur photography, but it has a hallmark. This is now a reserved item, so others cannot purchase it.