text: does anyone knows the mistery of swallow's (birds) nests? you know that swallows like to build their nests in places that are protected.  for example buildings, houses etc.  it is really annoying to have these nests in your house, so people ususally get rid of them.  well, in my hometown people believe that if you don't destroy their nests and if you leave them there for five years, they (swallows) are going to bring a small gemstone from the sea.  i have seen this type of gemstone but i want to know if the swallows really bring these stones from the sea or if this is just a myth of the people from my hometown.  if this is real, how much would each gemstone cost?  what's the name of this gemstone? it's a myth, but if it's tradition then give it a little respect.  and thanks for sharing such a beautiful story.