5 min. isn̢̢̮ââ¬Å¡Ã¬Ã¢ââ¬Å¾Ã¢t possible max 2 minutes per rock trust me i know what i m speaking about. How fast U can get full inventory, this depends how lucky U are when U mine. Because if there isn̢̢̮ââ¬Å¡Ã¬Ã¢ââ¬Å¾Ã¢t a lot of others mining and every time when u world switch there̢̢̮ââ¬Å¡Ã¬Ã¢ââ¬Å¾Ã¢s un mined rock it will be quite fast. I believe up to 30 minutes not more. Haven̢̢̮ââ¬Å¡Ã¬Ã¢ââ¬Å¾Ã¢t really take the time never