What is associated with: a dollar dated 1804 made of this metal is now worth over a million dollars?

Based on the clue 'a dog with a short flattened nose or the short fla...', what is the answer? What is referred to by 'a dogs descent 8'? Based on the clue 'a dogs nose and a maids knees are always this', what is the answer? Based on the clue 'a doll that has more realistic body parts than som...', what is the answer? Based on the clue 'a dolley house home to the madisons 10', what is the answer? What is referred to by 'a dolls house'? Based on the clue 'a domicile in which parents raise kids not their o...', what is the answer? Based on the clue 'a domino with both ends having the same value is c...', what is the answer?