wow i just looked into the gems marcet and saw we are on 17 Gems per Coin XD
I think soon we reach the 1 gem per coin or 0,5 gems per coin situation.
Becourse in also a few weeks we reached from 60 GpC to 17 GpC XD
regards
The Marketplace hit 17 GpC, but the site is paying 28:1. The site will also not likely get all that close to 9:1.
The lesson here is to earn those Gems while the paying is good!

hehe today is Current Gem Rate:
26.827 Gems to 1 Coin !
Also the site pays lower than 1 day before !
And the marketplace is now
15GpC 
This market and mining game is crashing soon

regards