Ann: Diamonds production, sales, development and exploration, page-43

Can someone shed some light on the following. I can only see one diamond sale in recent history, being way back in April 2012, of which they say only a portion of the inventory was sold, with the rest planned for following months. Is it possible that they still have a portion of diamonds from that original recovery (10,000 cts)? ie. the upcoming auction includes recent and past recoveries? Seems unlikely, but what happen to the other diamonds if not sold?