Read the memorandum or invoice carefully to make sure the description and the price matches what was agreed upon before shipping. Examine the merchandise thoroughly. Loose stones should be weighed and graded at all times regardless of how familiar you are with the selling dealer. Reputable and seasoned dealers are human and can make occasional honest mistakes, inadvertently sending a stone that does not match the description of the memorandum. Mounted stones should be scrutinized even more by measurement and grading. If anything is in question, contact the shipper immediately. Keep the discussion free of accusations explaining exactly what the discrepancy is.