It is actually very light.  The closure is a little unusual; it is a small wooden "flower" about the size of a dime and the cord loops around it.  Besides its beauty, the real advantage of this one is that is goes with just about anything.  I have worn it with pink, peach, blue, purple, black, and teal.  It looks great with all of them.  It is costume jewelry, yes.  But, it is very pretty and does not look cheap at all.  I get a lot of compliments on it.  :-)