Hey Philolgus...
Years ago... like in \'95... I went to Red Top Mountain state park, not far from Etowah here in Georgia. The parking area wasn\'t paved, but filled with tiny pieces of rock.
They\'re dark grey like slate (maybe not quite as blue). They don\'t break in shelves or chips like slate. Not pebbly like granite, either. Not sure what type of rock they are, but perfectly shaped and sized for figure bases as rubble or natural rocks.
I scooped up a standard plastic cup full of them and still have 1/2 the cup left.
A lot changes in 12 years, but I\'m betting you can still find the rocks there. Assuming that the I-75/Kennesaw area is convenient to you anyway.
...along with the fact that I every time I go to New York and order grits or sweet tea, folks look at me like I\'m an idiot...
Maybe they\'re just good judges of character? ZING! OW!
<ducks!>
Sorry, had to take the shot.

Hey, if I hadn\'t, Whiz would have come along and done it.
Kep