Congrats Steven, for getting all the marble answers right! (He even got the bonus question right – all the marble DID cost $840,000 back in the day).

For those of you waiting with baited breath, the answer key to your marble questions:
Belgian marble: Located on the State Reception Room floor.
French marble: Located in the chamber of the House of Representatives.
Italian marble: Located on the walls and pillars of the State Reception Room.
German marble: Located in the chamber of the Senate.
Alaskan marble: Located throughout the Rotunda.

(More marble samples on the jump)