This are from the Amazonian forest and it can also be found in the forest of Philipines.
You can use it as necklace, bracelet or belt. 
They are also used against the evil eye in infants (to scare people with strong or negative energy) and as a shield against envy, for which it is recommended one always carry a seed. Other attributes given to the seed are that it represents the union of the couple and prosperity. 48/50