In Yakutia, near the town of Mirny, there is the largest diamond quarry in the world in terms of total volume - the Mir kimberlite pipe (the town of Mirny appeared after the opening of the pipe and was named in her honor). The quarry has a depth of 525 meters and a diameter of 1.2 kilometers.
The formation of a kimberlite pipe occurs during a volcanic eruption, when gases from the interior of the earth burst out through the earth's crust. The shape of such a tube resembles a funnel or glass. A volcanic explosion carries kimberlite from the bowels of the Earth, a rock sometimes containing diamonds.