Stone is the only bonus resource meant specifically to enhance Production, and it does this well. It's found on many terrain types, and when upgraded with a Quarry provides a serious boost to Production (+1 from the resource, +2 additional from the Quarry after researching Chemistry).
Found in the Earth's crust and upper mantle, stone is perhaps the most crucial element in human construction efforts throughout history. There are three major classifications of stone - Sedimentary, Igneous, and Metamorphic - each differing in their origin.
|Civilization V Resources |
Citrus • Cloves • Cocoa • Copper • Cotton • Crab • Dyes • Furs • Gems • Gold • Incense • Ivory • Jewelry • Marble • Nutmeg • Pearls • Pepper • Porcelain • Salt • Silk • Silver • Spices • Sugar • Truffles • Whales • Wine