Generalunusual surface texture on quartz found locally
one more photo just to be sure you have enough to work from. ps you will notice that the corners are not rounded so I do not suspect any abrasion such as tumbling.
Maybe the silica, for the brown hyalite crust in you other thread, came from the pits? 
There are several minerals that can form at the same time as quartz in a pocket. My guess is that one of these formed at the same time the quartz was, at the end of the growth period. This causes the surface of the quarts to appear frosted when it is "stepped" from the partial blockage of the growth.
Tony Tony, that theory seems plausible, I must try and get some microscope photo's of the surface over the weekend perhaps it would make things a bit more conclusive.
Rob, no this sample was found in another area all together, the one with the silica is from a local beach and this sample just like the chlorite included one came from an area close to the maitlands mines, but about 10 meters apart.
