Well it cant be difficult to 'map' a kimberlite really can it....

Well it cant be difficult to 'map' a kimberlite really can it. Sounds like someone has an over-inflated opinion of oneself.
Its okay. Every geo seems to think they were the ones responsible for finding the Wits or Sudbury or the Pacific Ring of fire.
Dont blow an artery Ace.
Everyone is entitled to an opinion.
Not sure how your brother came into this conversation....
You must love him a LOT or do you just love his tight pink diamond?