Crystal Glass

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Usage
Crystal Glass can be used for:


 * Expansion of the Temple, Academy (Level 4 and higher), and both the Governor's Residence and Palace (Level 5 and higher).
 * Researching of Unit upgrades and Ship upgrades at the Workshop.
 * Training of Diving Boats at the Shipyard, Doctors at the Barracks and Spies at the Hideout.
 * Swapping it for research points at the Academy after Experiments has been researched.
 * Donations to the Miracle on non-crystal glass islands.

Other information

 * An Optician decreases Crystal Glass costs for all of these uses, except for Miracle donations, by 1% per level in the town it is built in.


 * A Glassblower increases the Crystal Glass production of a Crystal mine by 2% per level in the town it is built in.
 * The Ikariam Plus Crystal Glass production bonus is a separate process and does not affect the bonus from the Glassblower.