Higher Carat gems

[ZoddAlmighty]

Heya guys
I was searching abit but i have not found anything on the subject so apologies in advance if it was already suggested.
I feel that higher carat gems should have a steady increase in bonuses as the carats go up. By that i do not mean just influence but also their respective bonus as well.
I do not know how many carats gems can have but ive seen that some people posted that they found as high as 5 carat gems so lets say that on 5+ carats they get another bonus (example +5 to productivity).
Their respective bonus should get +2 points per carat making it +25 on five carats.
This way, high carat gems would become more valuable unlike now where they just get more afluence and are pretty meh in my opinion.
Have fun guys