Who doesn't love collecting in CO??? Options

[colo_heff]

I've walked a lot of miles and collected off and on in numerous places and honestly I've never
seen areas where the rocks are so diverse... here's a sample of what I collected within 1/3
miles, I'd be interested as to people's ideas of what's here (Name That Rock):

Attached image(s)

 

[MikeS]

If the last pic of the first group is a "worked" stone knife I would like to see a bigger pic if possible. I have a little experience flintknapping and have done some arrowhead hunting and may be able to give a second opinion on that. In the last pic it looks like the "wood opal" may have been a chip from an actual worked piece.