Thanks for the comments.
Without following what you fellas do here, I wouldn't have found one even if I cut my foot on it.
What are they?
Approx age?
We find a lot in Wilkes County in the next county over, but not all are quartz like yours. Many are rhyolite rock. They are gray to dark brown in color due to being covered in soil for 1,000's of years. When you are looking, don't just be looking for the white / clear ones. You may be passing over some very nice points.