The sugar quartz (pic 3) is far too brittle to have been used for some tools (axes), it just comes apart, into grains. But, it is possible pic 3 could have been used as a hoe. It all depends what context it was found.
I have found buckets of all types of quartz, unless you are actually finding lots of points/blades, I would say they are just rocks. Its flakes you need to be looking out for, where they knapped their quartz points/blades etc..
Good luck hunting..
Molly.
Thanks for the detailed answer for sure...there is flaking all over this area of the property...and in this one general location are many large quartz rocks....
How recent has quartz been used on farmland for various things?
It could be that these just 'chipped' off when moving all the quartz rocks into piles on the property and the shape is just a coincidence....
As far as the larger rock..that is "sugar quartz"? Neat...it just seems to perfectly shaped, flattened and "layered" to have broken off like that..especially when holding it in the hand instead of seeing it in blackberry camera phone pictures...
Thank you for your help!
Much more useful to a "newbie" in the hobby than a smart*** comment like "the indians used those as rocks...." those types of comments can turn people off from here just as soon as they join...