Pure gold barrel
The long barrel is in 24k pure gold (足金). As it is to be worn as bracelet which is susceptible to external pressures, greater amount of gold is used to make it thicker. Hence, it will not go out of shape easily due to the softness of pure gold. It has carving of coins with a Chinese character 福 in the middle. It represents good fortune.
The gold barrel can be taken out and worn as a necklace too!