Chert book?

[hbrown22]

Can someone give me the name of the book about chert? My husband & I came across a huge amount of nodules and I'd like to identify them. I believe there is more than one kind there and it doesn't appear to be a vein. It's like geodes but its different colors and patterns of chert. Most are broke open. I did find a nice size agate as well. Thanks!

 

[rock]

You will have to check the edges to see or feel if they have secondary flaking on them. Not all artifacts were flaked across the flat sides. I find quite a few with just the fine flaking on the edges only. Here is 4 examples but I have many more.

 

[hbrown22]

I'll double check them. Love the color of the third one.