These bowls are hand made - hand hammered (bitten) and hand carved by expert metal smith craftman. The original alloy is of 7 different metals:
Gold - the Sun
Silver - the Moon
Mercury - Mercury
Copper - Venus
Iron - Mars
Tin - Jupiter
Lead - Saturn.
The designs are of intricate Buddhist and Tibetan themes and cover the entire inside and outside of the bowls. The sound quality is exquisite and full bodied due to the variety of metals used.