Crystal

Crystal Mine
The Crystal Mine used to promote all kinds of gems and precious minerals, especially in the light. Consequently, production is much lower than in metal mine, so it is more difficult to promote the crystals intact, because they are usually in great depth and under enormous pressure.


 * The cost of construction may vary with the Statics Research. For these values the technology level was 0.
 * The production depends on the geology research. For these values the technology level was 0.