Chemical Mining

Summary

 * The chemical mining station is unlocked at Area 13;
 * Its coin cost to build triples every time and starts at 1500 (the increase in cost is unrelated to normal mining stations)
 * It will work both on- and offline (1/3rd slower);
 * Resources in each area are the same. You have to choose which chemical you want to search for;
 * Chemicals will be collected automatically;
 * Chemical mining Stations can be boosted 3 hours for 10 gems.

Note that the level 2 upgrade costs resources that sell for 24,000 coins, or 12,000 per resource per ten minutes; this means that it is not worth upgrading a chemical mine until the cost for a new mine exceeds 60,000, which occurs after 4 chemical mines (the fifth one will cost 121,500 coins).