Mr. K asked the waiter who led Lumian into the ground to take the diamond necklace and looked at it in his hand.

Vaguely, Lumian seemed to see a little golden light seeping out from the shadow of Mr. K's hood.

After a few seconds, Mr. K put the diamond necklace back into the waiter's hand: "It's fake, the workmanship is fairly fine, and it's worth 50 Filkin."