Most economical screener for clay?

[D_Young_747]

Looking to completely screen the rock out of a large amount of clay. Looking for the most affordable way to do that, brands, pricing, etc. Majority of screeners I've seen only have as small as 1 inch screens, I'd like as little rock in the clay as possible.

 

[ascsean]

Screening plants can come with any size screen you like you need to explain more what size is the rock compared to the clay what does the clay look like etc even pictures would be helpful. Normally you would like a bigger size screen for maximum screening area and also be running the feeder slow but a big screen would improve production.