I have been working with a local dealer and he told me that he gets his diamonds from a few people. He is also a member on polygon.net so he gets to see a bunch of other diamonds. If he gets a diamond from polygon, is it equivalent to me getting a diamond from a vendor on pricescope? Meaning, is he the middle man or is there another person from polygon taking a cut from the cutter before him? And does a cutter always own the stone? And finally, are vendors on pricescope the middle man or is there another person in line from the owner of the diamond?