Stupid Idea Re: Laterite

I've read somewhere that bricks and earthenware pots are basically laterite.
Could one "produce" aquarium laterite by smashing up some red clay pots?  
It'd be cheaper than dupla. :)  Hey, if you don't go all the way, you 
have your own "laterite shards" which can be pushed into the gravel just 
like DuplaRit K.

What do you think, sirs?

Erik D. Olson                		
olson at phys_washington.edu