Basalt Knife

Out Of Time

Sr. Member
Apr 10, 2019
326
874
Primary Interest:
All Treasure Hunting
Creek find. Napa, CA

This is an interesting artifact.

Rare to find basalt when obsidian is the dominant material in the area.

My hunch is it's very old.

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Out Of Time

Sr. Member
Apr 10, 2019
326
874
Primary Interest:
All Treasure Hunting
'Backed knife' isn't a term I've heard used about western artifacts, but I know they use it back east. I do think this piece fits the description.

I think basalt is relatively hard to work so not surprising if pieces are somewhat crude.

I do have one basalt biface that's pretty well made though.

Still haven't found enough to understand it well.
 

unclemac

Gold Member
Oct 12, 2011
7,069
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Primary Interest:
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fine grain basalt is not an uncommon lithic type where available...it flakes to a wicked sharp edge.
 

eyemustdigtreasure

Silver Member
Mar 2, 2013
3,602
5,582
California
Detector(s) used
Fisher Gold Bug Pro
Tesoro Cibola
Nokta Pointer; Phillips SHS5200 phones
Nokta Macro SIMPLEX +
Primary Interest:
Metal Detecting
Sure enough, it looks like one, all right!
Nice Find! :icon_thumright:
Knives were often a softer material, and easier to re-sharpen -
as these tools received a-lot-of-use...!
 

Tdog

Silver Member
May 30, 2019
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East Central Alabama
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'Backed knife' isn't a term I've heard used about western artifacts, but I know they use it back east. I do think this piece fits the description.

I think basalt is relatively hard to work so not surprising if pieces are somewhat crude.

I do have one basalt biface that's pretty well made though.

Still haven't found enough to understand it well.

I Googled "flint backed knife" and got these images...

https://www.google.com/search?q=fli...4Aw&bih=937&biw=1920&rlz=1C1CHBF_enUS858US858
 

Missouri Breaks

Full Member
Mar 21, 2021
122
275
CA
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I’m trying to figure out if that might be the more dense less glassy type of obsidian with the luster and the way the texture looks. I’m familiar with the basalt tools in nor cal and can see that it looks like he darker less iron inclusion type basalt but wow, nice find. That cutting edge has very pronounced serrations which is hard to pull off with the chippy rough type of basalt. Could it be a chert??
 

unclemac

Gold Member
Oct 12, 2011
7,069
6,995
Primary Interest:
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look up "dacite" or "black Jasper"... there is more than obsidian
 

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