Brownstone

Brownstone is a Rock of , mostly used by Agencies. While it is described as a common material, it can be difficult to acquire in large enough quantities once the sect map is mined. As an Building Material, it is inferior to and , both easy to acquire from the start of the game.
==Obtaining==
=== Mining ===
*75% chance to obtain 1 from , 2 with >100% Mining Yield
*25% chance to obtain 1 from , 2 with >100% Mining Yield
===Agencies===
====Passive Income====
5 Agencies have possible mines:
*Central Plain has 3,
*Riverbank Plains has 1,
*Mt. South has 1,
*Great Desert has 1,
*The Great Snowland has 1.
This means a passive income of 105 per day once all brownstone mines are built.
====Manual Labour====
The Manual Labour policy event will produce between 250 and 375 per policy event per brownstone mine in the agency, multiplied by \frac{Mining}{14} or 1 (whichever is higher), where Mining is the agency skill level. Assuming a single Agency on the Manual Labour Policy, which means an average interval between events of 20 days, this represents on average 15.63 * Max(1, \frac{Mining}{14}) per brownstone mine per day.
=== Others ===
* Trading: can appear randomly
* 20 as a random reward from opening found on the sect map at the start of the game
==Uses==
===Agencies===
*500 / 1,000 are needed to upgrade an Agency to level 2 and 3 respectively
*20 per day is needed for the Disaster Relief Policy for Earthquake and Flood disasters
*1500 needed to build an Agency Wonder
===Misc===
*Can be observed by an Awakened Animal for the "Smelling Soil" Thought Shard
*1 can be used to craft 4 s at a Stonework