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 an average time for a half marathon?   The time of the person in the middle of a half-marathon run in 2003 for men whereby 1409 runners competed is around 2 hours 30 mins.The fastest runner finished with a t â¦ ime of 1hr 12 mins 0 sec. The last runner finished in about 3 hrs 58 mins. The time of the person in the middle of a half-marathon run in 2003 for men whereby 1409 runners competed is around 2 hours 30 mins.