>Three for all is equally good.

What if it randomly spawns chunks of let's say 3 distinguishable sizes. A big chunk contains 4 items of the material, a middle one 3, and a small one only 2. All would reduce the physics of the clonk (mainly walking speed, throwing distance and jump height) depending on their size.

>Firestone

It would be cool if huge firestone-chunks had a really really big and unpredictable explosion radius. So It is really dangerous to mine with them, especially when you can only throw them a few pixels far. You could still mine with them, but it would make it more attractive for layers to produce special mining equipment like handpiece-big firestones or dynamite in the chemlab.
Of course you could still use huge firestone chunks with a catapult to nuke enemy bases. :)

>Snow

I want to build a snowclonk with big chunks of snow! \o/

>3.

I think you should only throw big chunks a few pixels far. Because of the firestone idea I wrote above, but also for logical reasons.
Also walking speed should be lowerd drastically.
Jumping: maybe a few pixels high.
In water you should be able to walk around on the ground, that would be funny. :)
And no scaling and hangling when carrying. The only way for obstacles is an elevator (wich is the most useless building atm), or a ropetower, or convayorbelts, or something.
Lorries could contain up to 10 chunks and because of wheels you can push and transport them much faster than carriyng manually.