Greetings Yesache! This is a really good question and my bet is that most contemporary witches really don't know what to do with it....I'm an avid reader and I've seldom come across the use in a spell. But I'm willing to bet that it has been used, especially within oral traditions....Does Santeria or Voodun use it?
I believe that Voodon traditions use it a good deal for this and that (I have never looked into Voodoo). I do however know that it can be used as a keep away and for protection. It is hollowed earth so it should be used with caution.