I was at the big pet store yesterday....

[Easternarcher]

and happened to go thru the acquarium section.
They had a few boxes of decorative stone on the bottom shelf. I assume to add character to the fish acquariums etc.
Anyhoo, I decided to dig in and see what these rocks were. I found 2-3 interesting spalls, that had quite smooth faces (silky smooth) where the rock had been broken open. it was kinda rusty brown coloured and not very heavy for a rock that size. don't know where it came from. Wonder if that describes a decent knappable rock...I hate to pay them 1.50 for one rock (sheesh) but I'm curious here.  I decided I don't like trying to knap glass, as I seem to get slivers everywhere.

[lostarrow]

I know the aquarium store I go to has Jasper , but none of it was of Knapping quality. Lots of fractures and inclusions.I'm guessing that was what it was. Hopefully someone with more knowledge will chime in . $1.50 isn't much for an experiment, even if it is a bag of gravel at the end, you will have the experience of what is not desirable in the end.

[Ncsnipe]

The pet stores around here occasionally have obsidian, but like glass, you're guaranteed to get cut and make everything you knap around untouchable.

[Easternarcher]

I just hate getting glass slivers n my socks! Even when I wear boots and long pants over them..Don't know how that happens!