8,744 feet (2,665.17 metres)
The 3,106 carat stone you reference is the rough diamond stone found in Africa, from which The Cullinan Diamonds were 'chipped'. That many carats weights about one and a third pounds. You can see...
He's 5'9"
The largest raw diamond ever found fit into the palm of an adult male's hand.
She's tiny. I would say about 5'2".