Can you help me identify this rock?
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Thread: Can you help me identify this rock?

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  1. #1
    us
    Mar 2016
    6
    2 times
    All Types Of Treasure Hunting

    Can you help me identify this rock?

    It was suggested that I submit the following pictures to you to see if you might be able to help me identity this rock. I found it in Arizona about 15 years ago. It is a very large and heavy rock.
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    Backcountry likes this.

  2. #2
    us
    Mar 2016
    NJ
    24
    30 times
    All Types Of Treasure Hunting
    I would say quartz. Not 100 percent.

  3. #3
    us
    Jul 2012
    San Antonio, Texas
    Garrett 250
    5,361
    3495 times
    Research/Limited field work
    Yep, I agree with Jimmy. Partly quartz, maybe chalcedony too. Lots of it out west...

  4. #4
    se
    Sep 2006
    Sweden
    White's V3, Minelab Explorer II & XP Deus.
    6,484
    2095 times
    Prospecting
    Looks like a mix of chalcedony and/or opal. A hardness test with a quartz should settle that. Get a scratch?
    Yes. Opal
    No. Chalcedony
    DDancer and cyndihaltom02 like this.
    Geologists are gneiss, tuff, and a little wacke.

  5. #5
    us
    Mar 2014
    Traveling US to work
    Current Whites DFX Past Garret GTI 2500 and others Prospecting Minelab GPZ 7000 Past SD 2100 GP 3000 (retired)
    2,067
    1683 times
    Metal Detecting
    Layering suggests its more chalcedony than opal to me. Has some nice translucence.
    Everyone Believes they have gold buried in the back yard... small wonder so few ever look for it.

  6. #6
    us
    Mar 2016
    6
    2 times
    All Types Of Treasure Hunting
    I looked at opal and was of the same opinion but I will look further, thanks for the feedback.

  7. #7
    us
    Oct 2011
    4,974
    3354 times
    Beach and Shallow Water Hunting
    flint nodule?

 

 

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