OT: Any Rockhounds here? Interesting Rock…

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ambro51
ambro51 Posts: 14,471 ✭✭✭✭✭
in U.S. Coin Forum

They knocked down a local old house and while looking for coins (2 merc dimes) I noticed a rock that was left behind when the fieldstone foundation was mostly cleared away. About 15”x 9”x9 is is Extremely Heavy it shines with metallic silver grey throughout. It’s not magnetic. Any ideas?

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  • rte592
    rte592 Posts: 2,235 ✭✭✭✭✭
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    I'm no geologist but my WAG would be
    metamorphic rock, a type of schist.
    Might hold some gold if you are in that geographical area.

  • MsMorrisine
    MsMorrisine Posts: 40,088 ✭✭✭✭✭
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    looks sedimentary - my wag is hematite

    but you'd get your definite answer on a geologist type forum

    Current maintainer of Stone's Master List of Favorite Websites // My BST transactions
  • ambro51
    ambro51 Posts: 14,471 ✭✭✭✭✭
    edited May 13, 2026 1:42PM
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    Probably but as a new poster I’d have to go through the whole dance :D

  • MWallace
    MWallace Posts: 4,683 ✭✭✭✭✭
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    It almost looks like a piece of petrified wood.

  • Mr_Spud
    Mr_Spud Posts: 7,275 ✭✭✭✭✭
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    Here’s what Google lens thinks it is

    Mr_Spud

  • Batman23
    Batman23 Posts: 5,494 ✭✭✭✭✭
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    Looks like Mica Schist to me, the stuff we find garnets in.

  • ambro51
    ambro51 Posts: 14,471 ✭✭✭✭✭
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    I think that’s correct. Thanks

  • DesertCoin
    DesertCoin Posts: 482 ✭✭✭
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    Looks laid down quickly by water and under pressure when formed.

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  • MFeld
    MFeld Posts: 17,151 ✭✭✭✭✭
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    Including “OT” in the thread title doesn’t make such an OT post any less inconsiderate.

    Mark Feld* of Heritage Auctions*Unless otherwise noted, my posts here represent my personal opinions.

  • WinLoseWin
    WinLoseWin Posts: 1,912 ✭✭✭✭✭
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    @ambro51 said:
    Probably but as a new poster I’d have to go through the whole dance :D

    Would this post be to a geologist type forum like a "parking lot find" is to a coin forum?

    "To Be Esteemed Be Useful" - 1792 Birch Cent --- "I personally think we developed language because of our deep need to complain." - Lily Tomlin

  • johnny9434
    johnny9434 Posts: 34,111 ✭✭✭✭✭
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    Still looks like a big piece of ugly coal, anyway...

  • ambro51
    ambro51 Posts: 14,471 ✭✭✭✭✭
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    @MFeld said:
    Including “OT” in the thread title doesn’t make such an OT post any less inconsiderate.

    I have deleted my reply to your post three times.

  • oldglorycoins
    oldglorycoins Posts: 305 ✭✭✭
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    Yup! Just a rock

    Micah Langford - https://www.oldglorycoinsandcurrency.com/

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