Diamond

''Clear and sparkly. Boss monsters have this.''

Diamonds are generally used for crafting hats. They are considered as a fairly rare Boss drop. Notorious monsters drop them as well.

Dropped by:
 * Sweeper

Guaranteed Diamonds
One diamond will drop certainly if you for the first time:
 * Beat Tower Floor 25
 * Beat Tower Floor 37
 * Beat Tower Floor 44
 * Beat Tower Floor 45
 * Open chest at Floor 38 room 2
 * Open chest at Ironbound 3 room 4
 * Open chest at Halvarian Peak 1 room 4
 * Open chest at Halvarian Peak 2 room 3
 * Open chest at Halvarian Peak 4 room 2