Update 2020: You CAN somewhat get crystals as a daily reward. The HTML5 shop can give you the option of free crystals every 12 hours.
Click HERE to read about it.
Let me know if you need any more assistance.
i dont know lol
Crystals can no more be obtained from daily gifts after the introduction of Daily Missions.
Сервис поддержки клиентов работает на платформе UserEcho