I identified a diamond a couple days ago using your “Diamond Prices” tool which was actually on the Efficient Frontier line. However, when I ran the tool again today using the same criteria, the diamond did not appear on the graph at all. Is there a reason for this? I initially thought that the diamond was sold, but it looks like it it still available. This is the diamond I was looking at, https://www.bluenile.com/ca/diamond-details/LD11663532

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