Gems FREE for Clash of Clans

How many gems are required to finish up a certain building? How many gems are required to buy certain amount of elixir, gold or dark elixir? In this article, I shall explain the formula that supercell has set to calculate the amount of gems needed to complete certain time-taking upgrade or filling out storages. This is New Trick to Get Unlimited Gem on COC! Free Download Now! Still Work! Try It Before this trick doesn't work!