A quick search via Google comes up with:

http://www.old-woodworking-tools.com/index/pages/034.htm

Besides the foregoing, there is an endless number of other kinds of Oil 
Stones, among them the " Deerlick," 'Seneca," "Niagara," "Chocolate," "Lake 
Superior," "Hindostan," etc., all of which are used as substitutes for the 
Washita. None of them are claimed to be any better than the Washita, and, in 
our judgment, none of them are equal to anything better than a second 
quality Washita.

http://www.1911encyclopedia.org/Hone

The finer kind, known as Arkansas hone, is obtained in small pieces at the 
Hot Springs, and the second quality, distinguished as Washita stone, comes 
from Washita or Ouachita river. The hones yield on analysis 98% of silica, 
with small proportions of alumina, potash and soda, and mere traces of iron, 
lime, magnesia and fluorine. They are white in colour, extremely hard and 
keen in grit, and not easily worn down or broken. Geologically the materials 
are called novaculites, and are supposed to be metamorphosed sandstone silt, 
chert or limestone resulting from the permeation through the mass of heated 
alkaline siliceous waters. The finer kind is employed for fine cutting 
instruments, and also for polishing steel pivots of watch-wheels and similar 
minute work, the second and coarser quality being used for common tools. 
Both varieties are largely exported from the United States in the form of 
blocks, slips, pencils, rods and wheels. Other honestones are obtained in 
the United States from New York, New Hampshire, Vermont, Ohio (Deerlick 
stone)

I could find no record of Vermont, Ohio but did find a spelunker reference 
to a Deerlick Cave in northeast Ohio.

Dennis Heyza
Macomb MI
 

------------------------------------------------------------------------