Hardened Clay

 is a refined material used in crafting and missions.

Obtaining
can be crafted using the following crafting stations:

can also be obtained by breaking structures in any Abandoned Ruins with Iron Pickaxe or higher.

Usage
can be used in crafting. It is also needed for several missions and commissions.

Mission
can be used during the course of the following missions:
 * Between 18 and 42 s are needed for The Portia Bridge mission, depending on how many commissions are accepted. There are a total of four commissions for Bridge Towers, and completing all four would require another 32 s in addition to the 10 from the first set of commissions.
 * One is needed for The Leaky Roof mission.

Commission
is occasionally requested on the Commissions Board in Rank B commission.

Construction
10 s are required when ordering the construction of Marble Gate at A&G Construction.

Worktable
is a required ingredient when crafting the following item:

Assembly Station
is a required ingredient when crafting the following items:

Gift
can be given as a gift to other characters. It is a universally neutral gift.

Recycle
can be placed in the Recycle Machine to produce the following items: