Actually thats typically what I find. Looks crumbly but, its not the sugar quartz. It was used a lot for points. I see the worked edge, most of my tools have that type of worked edge, so do my blade/knife preforms. Its not a typical axe but sure looks like it was going to be used to make points. I have a kirk made from that exact type of quartz, also a turtleback scraper (same colour)
If the quartz mines were far away they would break the quartz up into more manageable peices to take back to the campsites to work on, I feel that typically looks like one of those pieces. It's definetly showing signs of knapping, I would keep it.
Molly.