Rubies disappear frequently.

The game is a ripoff. You are induced to purchase rubies and the game positions potential deductions so that you unintentionally use rubies on items/events/speed ups that are unavoidable. I recently lost 265 rubies (equivalent of over 25.00) on a supposed speed up if an upgrading mine. It takes about 8 minutes to upgrade mine so clearly not something you would spend that amount of money on. I spoke with customer service repeatedly and they refused to assist or acknowledge the problem which leads you to believe it is intentional. Avoid the game or avoid purchasing any rubies.

lwollert about Dragons of Atlantis, v5.2.1