I've been playing VP for a while, and I can't help but notice that Quarries feel weak in the late game, so using SQLiteSpy I compiled all of their yields they can get. I did not include Policies as both are affected exactly the same way. Also not counting resource yields when unimproved and from buildings. Mines Unlocks at Mining. Can be built on resources, and any hill. 1 base yield 0 to 1 for connecting resource, and sometimes 1 of another yield on top of that, eg Gems get 1 1 from connecting) 1 from Forge 1 at Machinery 1 at Steam Power 1 at Industrialisation (no fresh water) or Steel (fresh water) Total: Ranges from 5 to 6 , as well as 1 of another yield for certain resources Note: Russia gets Ostrog, which gives another 1 1 , and then another 1 of both on top for Strategic Resources. Earth Mother gives 1 and 1 . Quarries Unlocks at Construction. May only be built to connect resources 0 base yield. 0 to 2 for connecting resources (max 2 for Stone and Marble, min 0 for Uranium and Amber, can get 1 or 2 other yields. Examples: Jade gets 1 1 , Uranium gets 0 1 , Amber gets 0 2 ) 1 at Steel (no fresh water) or Electricity (fresh water) 1 at Dynamite (no fresh water) or Steam Power (fresh water) Bonus 1 from God of Craftsmen belief Total: Ranges from 2 to 5 , as well as 1 of another yield for certain resources. Note: Russia's Ostrog only affects Uranium. God of Craftsmen gives 1 Production and 1 Faith. To make Quarries equivalent to a regular hill Mine, you would need a Stone or Marble, and the God of Craftsmen belief as well. Since Quarries are rarer and resource dependent, shouldn't they be stronger rather than weaker? Not to mention they unlock at a later tech. I think Quarries should get the same amount of from technologies as Mines. Perhaps 1 in one of the Renaissance techs. Since Forge gives 1 to Mines, Quarries should get 1 from a building too. Stone Works is an obvious choice, but is that too early in the game? As you can't control the placement of Quarries, perhaps there should be no difference from fresh water. Side note, Oil Wells give 4 3 at most by game end. Yields from Oil are not increased by buildings (except Ostrog), and no Policy affects Oil Wells. Perhaps some love here?