What kind of rock is this?

I found it in an area where Indians lived. In Haines city Florida and it's the same material as an arrowhead I found nearby.  The rock has a smooth brown surface that reflects alot of light and its edges are sharp and many parts of the rock have small gorges in it where it is white rock with what looks bubbles stuck together about the size of water snail eggs   And the bottom of rock of white and it looks similar to cement as it's not smooth...sorry don't have pics right now

flint or chert
http://www.beg.utexas.edu/mainweb/publications/graphics/chert.htm

http://www.riverbendlapidary.com/flint/index.html