Howdy,
On the contrary, the higher quality pieces are normally made out of good quality flint, quartz, etc. Much of it will be translucent...a few pieces even transparent. The really good paleo pieces I have are normally "glossy" giving the appearance of wax or soap at first glance. Nice little tool you have there. Of course what they made things from varied greatly from location to location...native Americans traded a lot, but were also opportunists in the materials they used.
Happy Hunting,
Atlantis