a quick search on the pricescope database for emerald cut diamonds between 2.2 - 2.5 cts, H color, VVS2 clarity, indicates that you would have to pay between $14,000 and $16,500 to purchase a stone like that from one of the online vendors. so--something''s up. who is offering the stone for sale? is it by any chance a private individual?
okay, i was going to say, if it''s a private party who''s anxious to unload the stone, and if the stone''s specs are what she claims them to be, then there''s a chance you''re looking at a great deal. just use an appraiser, as you said. good luck.