mining milestone

[thebigbum243]

I see no use for crystal, unless it becomes another donation item for guilds, theres no need for them except super early on, 1 floor for 100k worth of gems? thats like 160 energy for 100k gold, if I afk for an hour I make somewhere just over 5m. Again, if they are used for guild buildings later on, i agree, 1 gem a floor, but if there are no plans to be used with guild buildings, it makes no sense later Ive just been saving mine.