Clarity: Clarity assesses the internal characteristics of the diamond as it formed in nature. This C factor is graded on a 10-grade scale and also impacts the diamond's rarity and value.
The fastest marathon ever was run by Geoffrey Mutai (2:03:02) at the Boston Marathon on April 18, 2011. But because the legendary Boston course does not meet IAAF layout standards, the World Record belongs to Patrick Makau (2:03:38) recorded at the Berlin Marathon on September 25, 2011.
What is the fastest ever time to run a mile? As of 2017, the world's record is 3:43:13 (3 minutes, 43.13seconds) set by Hicham El Guerrouj of Morocco on July 7, 1999. The record for women runners is 4:12:56 set by Svetla â¦ na Masterkovaof Russia, August 14, 1996.