And calacatta is one of the world's most expensive types of marble. It's more than double the price of carrara marble, yet mined in the same mountains. But the key to calacatta's price is its rarity.

Using an antique to wedge open a door is insane enough, but for it to be valued in the millions is just bonkers.

Calacatta marble countertops are more expensive than Carrara counters. They can cost up to $180 per square foot. Cantley ...