Triangular prism.. Couldnt scratch it.

Rean.c

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Dec 4, 2014
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Triangular prism.. Couldn't scratch it.

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Tried scraping it with a knife and it sparked.. And bent the knife blade..? Any ideas on what kind of material it is


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Yea gotta get that fixed [emoji1], and wouldn't slag be from smelting.


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And look more like a rock?


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Interesting, it reminds me of the prisms used in Sherman tank periscopes. The actual size of the prisms used in them is 5 3/4" long x 2" wide x 1" high. These are silvered on the 2" wide side.

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Interesting! There's probably no way to test if that's actually it though? And I found it where I found a lot of old ship wreck pieces.


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Quartz crystal prism. Quartz spark against a knife blade. If part of a chandelier, perhaps the end where it connected broke off. But quartz for sure. Tiny drilled hole at one- or both end(s)?
Hate to be a freak, but narrowly missed being involved in an accident on my way home the other day. Guy ahead of me texting, drifted into oncoming traffic. It happens. I know you were going slow. Still, it was ugly- even at slower than highway MPH.
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Interesting! There's probably no way to test if that's actually it though? And I found it where I found a lot of old ship wreck pieces.


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Well now that you mentioned you found shipwreck pieces in the same area, I would say it is most likely a ship or boat deck prism. These would be installed into the deck in order to shed light below deck. They work remarkably well for that purpose too. Cool find for sure!

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Oh wow !! That's really cool!! Thanks a lot for all the help.


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Any ideas why they would cut this into it????
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