Archaeologist's set

The Archaeologist's suit is a set of vanity items made up of the Archaeologist's Hat, the Archaeologist's Jacket and the Archaeologist's Pants. These items are all supposed to be equipped in the Social slots as they only provide a visual appearance.

While the other two pieces are crafted, the Archaeologist's Hat is dropped by Doctor Bones.

Crafting both the suit and pants requires 150 rotten chunks, or 30 pieces of leather.

It is possible to craft these items in a world that has the crimson instead of corruption only by importing corruption blocks from another world to create an artificial corruption.

Trivia

 * It is very likely that these items are reference to the Indiana Jones series of movies due to word play. (i.e.; Doctor Bones, Doctor Jones), and due to the fact that he is an archaeologist.
 * It could also be a reference to the main character of the game Spelunky, which sports similar clothing. It should also be noted that Terraria and Spelunky share some very similar features, such as classic side-scrolling gameplay, pixilated graphics (at least in Spelunky classic, not Spelunky HD), and the central theme of cave exploring (aka spelunking, which is obviously where Spelunky got its name). Therefore, this theory is very possible.
 * The hat sells for more than the other clothing like many armor/vanity helmets

History
Tenue de l'archéologue Archaeologist's Suit Archaeologist's Suit Костюм археолога