Astrogem

Astrogems are a premium consumable. They may be used to speed up your progress.
You may acquire Astrogems:
* If you find Nezz on the Airship
* Randomly as HIdden Trasure on the Airship
* Completing Quests
* Completing Missions
* Releasing Astromon
* Purchasing in the Shop at the following rates:
Astrogems	Bonus	$	£ 	₩
50 	0 	 	2.29 	3,300
100 	0 	 	3.39 	5,500
200 	10 	 	6.99 	11,000
600 	60 	 	19.99	33,000
1000 	150 	 	34.99	55,000
2000 	400 	 	69.99	110,000
It is represented as a blueish purple gem with a star logo.
There is no apparent maximum amount of Astrogems that may be held.