I do not know if it was a zombie movie of spirit movie, but this woman some how is able to make people rise out of a lake or river, I don't remember if there dead or ghost, some how a pearl neckles has a big part to play in the movie, I think this was made in the forties or no later than 52. I have been trying to find the name of this movie for ten year? Help!!

Is it
Shock Waves

Shock Waves (1977) - IMDb (http://www.imdb.com/title/tt0076704/)

Visitors to a remote island discover that a reclusive Nazi commandant has been breeding a group of Zombie soldiers.