Quartz is just so hard to tell from a photo. If the first set is front and back meaning the second row is back I would have to say no on them. The ones I find does not have any rind or cortex on them. But doesnt mean they didnt leave it on. The milky white quartz piece might be something 3rd from the bottom and the last pic might be something all 3. I have to use a loop to really know. The loop really shows the fine flaking and that is what you need or if you have a scope that will do. Keep looking they will come.