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Knap nightmare

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sleek:
Obsidian.... everyones favorite point material. You couldn't convince me it make a point. I cant pressure flake it, or precussion. With pressure flaking,  i get short flakes. With percussion, i get crumbly dusty mess. I abrade fyi. I cant get the stuff to shoot flakes. It may make a flake, but steps and hinges.

I can knapp glass, and some rock sometimes, and milk glass is my favorite as well as jadite. Obsidian, it doesnt make a point. Not for me.

Dakota Kid:
Try hitting it lighter when using percussion and flattening your angle when pressure flaking. If it starts to step you have to clean it up before proceeding or it just gets worse.

If that doesn't work, you may have just gotten some crumbly obsidian. I've noticed that some pieces just want to disintegrate. I've had the worst luck with mahogany where the black is more prominent.

Zuma:
X2
Zuma

jeffp51:
If it is all you can get your hands on, you figure out a way to make it work--at least somewhat.  Since I have never worked anything else besides bottle glass, I can't tell you how to treat it different than harder materials.

gutpile:
make you a callahan pad for pressure flaking....gut

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