Strange Rock????
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  1. #1

    Feb 2007
    Ridgecres, Ca
    Whites Spectrum Eagle and Minelab GP 3000
    16

    Strange Rock????

    Maybe someone can help me identify this rock I found. I was detecting in the Southern Ca high desert near Randsburg. It gave me a super hard signal. I thought maybe a "hotrock", but it is NOT magnetic! I ground a portion of it off and it is silver/black metallic looking (shiny spot in the picture). Could it be Silver?? Nickle?? Platinum?? Meteorite?? Please help.
    Thanks
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  2. #2
    us
    Desert Rat

    Mar 2007
    Ridgecrest, California
    Fisher Gold Bug 2 White's MXT
    96
    6 times

    Re: Strange Rock????

    Would have to say not a Meteorite, much too angular. Aside from that I have no idea.

    N

  3. #3

    Apr 2006
    Ventura, CA
    LST
    801
    11 times

    Re: Strange Rock????

    exposed surfaces of silver are black. here's a link

    http://mineral.galleries.com/mineral...ver/silver.htm

  4. #4
    us
    Jul 2005
    indiana
    Tesoro Lobo ST, Whites MXT and TDi,Garrett AT Pro and Ace 250
    109
    31 times
    Prospecting

    Re: Strange Rock????

    I found a rock similar to that in Arizona while gold hunting near payson 4 years ago.Looks like magnetite to me. If it has any reddish spots in the rock , It is definite magnetite/hematite, an iron ore. A rock shop might still give you some bucks for it so don't throw it out. It doesn't look right for a meteorite.
    -tom

  5. #5
    us
    May 2006
    Mesa, AZ
    None
    1,807
    295 times
    Prospecting

    Re: Strange Rock????

    Quote Originally Posted by tvanwho
    I found a rock similar to that in Arizona while gold hunting near payson 4 years ago.Looks like magnetite to me.
    -tom
    Magnetite is magnetic, and he said it isn't magnetic.
    Sincerely,
    Randy Wright
    History Lover

  6. #6

    Oct 2007
    Currently Spanish Trail Utah
    V-sat & Falcon Gold Probe
    31

    Re: Strange Rock????

    SPHALERIT (Zn, Fe)S, Zinc Iron Sulfide and when the iron is not present, makes some really cool crystals.
    In a nut shell, High grade zinc ore.... I would look for the Limonite deposit that spit it out, Normally the strata will go oxidized limonite(micron gold)/sphalerit cap and decent gold at the bottom of the cap at the sheer zone.

    This is going by the pic, Silver is a possible contender as well as some Pyrites.
    "Exploration is the Foundation of the Modern World"

  7. #7
    Cptbil

    Mar 2003
    Az/NM/Ca/Nv/Tx
    1,402
    59 times

    Re: Strange Rock????

    It sure looks "volcanic" in orgin!
    AND!
    HAY!
    It could be a Type of Meteorite
    You know, the kind blown out of a volcano,
    A!
    Volcanic Bomb?
    Any volcanos in the general area (w/in 10-20 miles?)
    CptBil & Bugs

  8. #8
    us
    Jan 2008
    San Diego
    Tesoro LST & SS
    18

    Re: Strange Rock????

    Sphalerite(?) has a red/ reddish yellow streak and also, when struck, has a sulfur odor. If it is soft, it could be molybdenum or it could be psilominane(?)

  9. #9

    Jan 2008
    Lompoc
    XLT, GMT
    13

    Re: Strange Rock????

    Couldn't you simply measure the specific gravity of the "rock" and find out what it is?

  10. #10

    Jan 2006
    62
    2 times

    Re: Strange Rock????

    Try manganese. A water fused lump of minerals in nodes found in deserts and often confused with meteorites.

    Aufinder01

  11. #11
    us
    Feb 2005
    Menominee, Michigan
    T-2,
    1,271
    7 times

    Re: Strange Rock????

    if you cannot figure it out, send it to me i could take it to work and have one of the guys shoot it with a analizer, we got it for checking weld compositions, a had a piece that had me stumped, that he tested and it was 98% zinc, which had a grey and white exterior, and shined up nice, as your piece does
    where's the good stuff

  12. #12

    Oct 2007
    615
    124 times
    Banner Finds (1)

    Re: Strange Rock????

    I think it looks like Biotite that is a common phyllosilicate mineral within the mica group.......

    it is an indicator rock when looking for gold....


    db

  13. #13
    us
    :No one knows everything about anything:

    Dec 2009
    Northern Cal.
    Minelab SD2200D-5 inch dredge
    142
    5 times

    Re: Strange Rock????

    Did you ever find out what your rock was? Try a scratch test. If it scratches red its probably hematite. Jimmygoat

  14. #14
    us
    Jan 2010
    envyville
    30

    Re: Strange Rock????

    It has a "Galena" appearance to it. Strange although
    I don't always drink beer. But when I do, it's on. And I prefer not to talk about it.  Stay Thirsty my friends.

  15. #15
    us
    Sep 2007
    Sal Sagev Adaven
    E-TRAC,,,, SOVEREIGN GT,,,, GP 3500,,,, GB PRO.
    2,941
    49 times
    Metal Detecting

    Re: Strange Rock????

    Quote Originally Posted by AuExplorer
    SPHALERIT (Zn, Fe)S, Zinc Iron Sulfide and when the iron is not present, makes some really cool crystals.
    In a nut shell, High grade zinc ore.... I would look for the Limonite deposit that spit it out, Normally the strata will go oxidized limonite(micron gold)/sphalerit cap and decent gold at the bottom of the cap at the sheer zone.

    This is going by the pic, Silver is a possible contender as well as some Pyrites.
    Agree!
    I'll just follow you with My E-trac, Sov GT,or GoldBug Pro.

 

 
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