If you click on the mine, there's a timer already. At level 3 is 1 gem every 1h36m

Vicky said:

It would be nice if you could put timer - clock in gem mine.

I know i have gem mine lvl 3 but i dont like to go by them 1 gem every 1h36min. I am person of a time-clock,hour, min, sec. Give me a real "timer" i dont go by the "words" lol

I like the timer in spirring pit , counting down time not like gem mine lol