In the suit of Diamonds we enter into the world of privilege which is the result of business acumen or inheritance. In Europe, wealth was a direct result of trade and land ownership.
The Ace of Diamonds represents the focused laser of WILL which makes ideas and plans manifest.
The King of Diamonds can be seen as: Rich Uncle Pennybags aka Mr. Monopoly : WEALTH
and the Jack of Diamonds as the fair haired boy or Richie Rich: LEGACY
The 10 of Diamonds is any Corporate Headquarters, or large scale financial institute. The logo of the World Bank is an apt symbol for the 10 of Diamonds : POWER