In the picture you can see.
There are
- 3 stone mines ugly and not informative: it seems to be exhausted
- 1 marble mine shown as in flash version
- 1 marble shown as stone mines it seems to be exhausted

https://pasteboard.co/TLUG0aWtAwWi.png

Funny part, until I write here newly found marble mine bugged too

https://pasteboard.co/b7xppOrWzrac.png