Unlike the wholesale price of uncut diamonds, the wholesale price of other uncut gemstones has fallen considerably in the last year. Thus, although the retail price of jewelry made with gemstones other than diamonds has not yet fallen, it will
inevitably fall.
Which of the following, if true, most seriously weakens the argument above?

Question

Examsnet · Accepted Answer

Correct Answer is :  The cost of processing uncut gemstones has increased during the last year.

GMAT Verbal Reasoning Practice Test 2