Stone

Stone is used especially as a building material.

Stone Base Value

The primary sources of stone in a holding are the product of local stone quarries and the likelihood of stone byproduct from each ore mined effectively imported to the county.

1. Stone Quarries (base = +0.1%)
   1. Simple Stone Quarries: +3%
   2. Shallow Ore Mines: +5%
   3. Watermills: +7%
   4. Large Stone Quarries: +10%
   5. Large Mines: +13%
   6. Massive Stone Quarries: +15%
   7. Shaft Mines: +17%
   8. Blast Furnaces: +20%
2. Stone Byproduct, depending of specific mines (50% of these values combined):
   • Marble Base Trade value x 100% (true mines, everything extracted can be used)
   • Gold Base Trade value x 75% (true mines)
   • Silver Base Trade value x 80% (true mines)
   • Copper Base Trade value x 90% (true mines)
   • Iron Base Trade value x 50%  (not all true mines, but this brings stone to all corners)
   • Tin Base Trade value x 90% (true mines)
3. Stone Remains from former empires:
   • Ruins from Roman Empire (Mediterranean) and Sasanian Empire constructions: +25%
   • Surrounding regions: +10%
4. Province Trade Development Modifier.
5. County Trade Deal Modifier.
6. Province Trade Product Modifier.
7. Tradition Ancient Miners +15%.
8. Local Consumption from Development.

Stone Trade Value

Stone Trade Value adds up:

• Stone Base Value.
• Holding stone Maintenance cost:
  • Castle maintenance cost: -15% x Level
  • Temple maintenance cost: -10% x Level
  • City maintenance cost: -5% x Level
• Active Construction cost:
  • Building construction cost: -75%
  • Castle upgrade cost: -150%
  • Temple upgrade cost: -100%
  • City upgrade cost: -50%