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First stone point and size question

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Dustinhill:
Thanks for the replies everyone, meant to reply sooner but I got very busy with work. I probably will be out of commission for the next few weeks because of travel and work, but after that I will post some pictures with what happens with the heat treating. Thanks again for the advice and information!

JackCrafty:
Probably a volcanic rock.  I don't think there's much flint in Iceland but I don't know for sure (flint is formed within chalk or limestone).  I would guess that your rock is similar to Dacite or maybe a high grade Basalt.

mullet:
The major rock in Iceland is made up of 90% Basalt and 6-10% Ryolite, Dacite. Also a very rare rock from volcanic formations like Obsidian called Palangonite which is found in the
hills around Reykjavik.

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