[quote="Theeggman"][quote="Ivory"]if the flop, turn and river comes all diamonds A 4 6 8 10 ...the person with the highest diamond in their hand wins.

Not really true. Whoever has the highest diamond in their hand that is greater than the 4 wins. If no one has a diamond > 4 then the pot is split between all those who went to showdown.
Still not entirely true. If someone has KQd, they lose out to 79d.