What does the stamped 333 on gold ring mean?

Stamps on Gold and Platinum Rings

The stamp 555 on a ring is 14k Gold

The stamp 999 means Gold with Platinum

The Stamp 333 on a ring is very Rare and Exclusive, it has different value's -

stamped as ; 333 means Platinum. (rear white Gold)

stamped as ; 333 , 350 means, Platinum above 10000 years old.

stamped as ; 333 , 360 means, Platinum above 20000 years old.