Special resources are favorable conditions that may be found on certain tiles on a planet. Building a planetary improvement on a special resource will see that improvement receive a bonus based on the type of resource it is. Note that the bonus increases the capacity of the improvement, not necessarily its output. For example, a manufacturing improvement built on Rare Elements (+300% industry) will also require +300% BCs to be spent. So you should think of these bonuses as "buy one improvment, get 1 (or 3 or 7) free".

Artifacts: +100% Research

Fertile Soil: +100% Food

Mineral Deposit : +100% Industry

Mystic Spring: +100% Approval

Ruins: +100% Influence

Precursor Artifact: +300% Research

Splendid Soil: +300% Food

Rare Elements: +300% Industry

Precursor Library: +700% Research

Precursor Mine: +700% Industry

Notes Edit

• These bonuses apply ONLY to the project/improvement built on them, not to the whole colony.
• --- These bonuses DO NOT apply to 'capital' improvements, Trade Goods, Super Projects, or Galactic Achievements.