Author Topic: ever seen knappable sedimentary rock?  (Read 7635 times)

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Offline ozy clint

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Re: ever seen knappable sedimentary rock?
« Reply #15 on: January 06, 2010, 02:57:44 am »
nah, i haven't got any, it's just the only knappable rock i know of here in oz.

Offline otis.drum

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Re: ever seen knappable sedimentary rock?
« Reply #16 on: January 06, 2010, 06:17:02 am »
clint, hmm, other aussie knappables! what about televisionscreenite  ???   :)  ;D

but what about quartz, basalt, opal?

and i thought there were some other flints around. not sure though.
Cape York, Australia

Offline ozy clint

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Re: ever seen knappable sedimentary rock?
« Reply #17 on: January 06, 2010, 07:33:28 am »
otis, you're right you can knap basalt but it's pretty rough. not sure about opal???? if i find one big enough to knap i ain't knapping it!!!

Offline otis.drum

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Re: ever seen knappable sedimentary rock?
« Reply #18 on: January 06, 2010, 08:18:30 am »
i'm with you there clint, but apparantly it can be done.

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Cape York, Australia

Offline jcinpc

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Re: ever seen knappable sedimentary rock?
« Reply #19 on: January 06, 2010, 10:57:13 am »
ozy:  if was you i would heat adn try it,cant hurt


jc:  the rock in the 8th and 9th pics of yours,dont know what it is but i think there was some of it in that box i got from you.i like it,it works nice

all those pics of the cherts are that stuff I included in your box, some is lighter colored than others. It needs no heat at all, is slick when you get under the cortex

Offline StevenT

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Re: ever seen knappable sedimentary rock?
« Reply #20 on: January 06, 2010, 11:07:19 am »
Ozy... in your second picture, look at the bottom of the rock. Those look like flake scars to me. If they are, then I would say give it a try knapping it raw. If you have a bunch of this stuff, doesn't hurt to try it raw and heating some. Looks like it will make a pretty interesting point.

Offline arappaho

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Re: ever seen knappable sedimentary rock?
« Reply #21 on: January 07, 2010, 01:03:40 am »
Good stuff guys. I'm going to have to get me one of those Opal knives. ;)

JC, I love that yellow/green stuff of yours. Looks like it would knap real good.

My guess on your mystery material, ozy, would be a meta-sedimentary rhyolite,
which is why it 'might' knap and heat treating probably won't help much.
Looks like some of the stuff from the southwestern US.
But that's just guessing. :)

Joe


Offline Newbow

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Re: ever seen knappable sedimentary rock?
« Reply #22 on: January 07, 2010, 02:31:11 pm »
Re: Opal.  I've seen and lusted after the opal knife, probably like a lot of us.  It's beautiful!  It's definitely not pocket change but it only costs 12 times as much as Neolithics (Craig Ratzat) is asking for banded Polish flint.  I ordered some from Australia and the shipped cost was $20 (U.S.) an once, which is a bargain compared to the $500 to $2000 an once they want for gem quality stuff.  What I got comes in polished slabs about an inch thick; polished so you can get an idea what it looks like inside and, judging from the shape, because it comes from the ground in slab form (??).  I got it because I had the extra money at the time, but it will be quite awhile before I get to where I think my skills are up to it.  I'll also need to slab it first.    Ozy Clint:  I understand that they let you dig around in the opal fields (for a fee, I assume).  You might be able to come up with some interesting stuff if you could get out there.