Thanks again for the nice comments.
Stopped by the jewelers and the diamond is real and it is being sized for my wife's right ring finger. The jeweler said it would be worth about $800 retail.
When he tested it before he cleaned it his device came up with Mossanite but then he cleaned it and it went right to Diamond. He said the salt and other things can give false readings so always clean them real good before you consider them fake.
Concerning Ocean City finds so rare, this place is packed all summer. There are several web cams that are pointing right at the beach. There was at least a 5 mile back up just trying to get to the Bay Bridge the day I came home! I think the guys hunting it don't like to advertise what they find. Just my opinion. I know I am planning another trip down near the end of the season!