Crystal chests

Description
A crystal chest contains a (randomised) number of crystals. Once inside a player's inventory, these chests expire once the month is over, so it is best to open them before that.

Crystal chests can be obtained primarily from playing story mode. It is also possible to obtain them from vitality rewards.

Variants
Crystal chests come in several varieties, which are listed below in order of rarity.
 * White Gem Stone Chest
 * Green Gem Stone Chest
 * Blue Gem Stone Chest
 * Purple Gem Stone Chest
 * Pink Gem Stone Chest
 * Orange Gem Stone chest