Is the answer the same place 20 years later? I would like to know if anyone has an answer to this one. My grandmother purchased her engagement ring in '78 from a very respectable jeweler is appraised for $5,500. She took it back last year to the same jeweler (the same ring no changes) and it appraised for $2,500. They wrote her a letter explaining that diamond prices were at a high in the late 70's and that her ring was now at today's market price. Is this right? The stone in question is a .59 vvs2 G round brilliant excellent cut.