Dead coral rubble

You don't have any LFS or other reefers in your area that you can get some LR or dry rock rubble from? I have 150 lbs of dry rock sitting out on my driveway that I'm sorting. The best pieces I'll keep in my sump and the rest I'll sell cheap. I have a 5g bucket full of dry rubble.
 
Doesn't it matter weather you are using dead coral or not as a substrate for certain inverts or corals?
I do have about 40 lbs of dry rock but no rubble (yet) out in my barn.
 
Ok. I am not asking how to make rubble.
Does dead Rock rubble serve the same purpose as dead Coral rubble ? Are they inter changeable, or do they each have their own specific uses?
As I said, I can make 50 lbs of Dry rock rubble with my sledge hammer. No problimo.
Will dry rock suffice for what I want to do as posted in my first post on this thread?
 
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