There's info about all the dragon types scattered throughout the book and each type gets a one page write up about lairs/terrain, favored treasure, physical characteristics, diet, personality/motivations, and relations with other creatures. Is there something in particular you wanted to know about Adamantine Dragons?
The Bronze mostly unchanged. "Duty bound and honorable", but some rare few take it too far and become tyrannical.
Cobalts are only impressed by physical strength. They dwell in cold parts of the world or Shadowfell. They like to dominate barbarian tribes. Most take pride in the strength of their subjects, but the worst treat them as slaves.