Featured Not a rock hound please help ID this stone

Discussion in 'Jewelry' started by Calico, Jun 29, 2017.

  1. Calico

    Calico Well-Known Member

    Hi Everyone ! I'm very bad at IDing various stones, is this Ocean Jasper ?
    ring1.jpg ring2.jpg
     
  2. Any Jewelry

    Any Jewelry Well-Known Member

    Yes, could be ocean jasper, although that grey area looks like chalcedon, in which case it could be (dyed?) agate with a chalcedon inclusion.
    Ocean jasper:
    [​IMG]
    Chalcedon:
    [​IMG]
    Green and yellow agate:
    [​IMG]
     
  3. silverthwaite II

    silverthwaite II Well-Known Member

    Morning, AnyJ! Your top photo looks like something on a slide under a microscope!
     
  4. Calico

    Calico Well-Known Member

    AnyJ, thank you for the help. Everything you just said is Greek to me. :sorry: If you were to sell this ring what would you call it ? It tests just above glass in my gem tester field.
     
  5. Any Jewelry

    Any Jewelry Well-Known Member

    It does, but I don't think it is contagious.:eek:
     
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  6. Joshua Brown

    Joshua Brown Decently-Known-Member

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  7. Any Jewelry

    Any Jewelry Well-Known Member

    Chunky sterling silver and agate ring.
    I am not entirely sure about the agate, maybe someone else has a better idea. Jasper, agate and onyx all have roughly the same hardness, just above glass.
     
  8. Joshua Brown

    Joshua Brown Decently-Known-Member

    I don't belive it's jasper. I just did some looking and Wiki says "agate has curved bands and onyx has parallel bands." So it's probably not onyx. :)
     
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  9. Any Jewelry

    Any Jewelry Well-Known Member

    To complicate matters, this is also onyx, no parallel bands:
    [​IMG]

    Calico, for now I would call yours agate.
     
  10. clutteredcloset49

    clutteredcloset49 Well-Known Member

  11. Calico

    Calico Well-Known Member

  12. Any Jewelry

    Any Jewelry Well-Known Member

    The inclusion is chalcedon, not agate.
     
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  13. all_fakes

    all_fakes Well-Known Member

    I would clarify. In jewelry, there may be different usages, but in mineralogical terms, "Chalcedony is a generic name given to materials that are composed of microcrystalline quartz. Agate and jasper are both varieties of chalcedony....agate is a translucent to semitransparent chalcedony."
    If there are bands, it is likely agate, though other kinds of chalcedony may also be banded. It depends on the degree of translucency, though "observing bands in a specimen of chalcedony is a very good clue that you have an agate." With a small inclusion, in a photo, it is probably not possible to differentiate agate and other types of chalcedony. But they are basically the same material. Jasper is the same stuff, but opaque; and they are all varieties of quartz.
    See http://rocktumbler.com/blog/what-is-agate-jasper-chalcedony/

    This is very likely jasper, and the inclusion is some kind of chalcedony, likely agate.
     
    Last edited: Jun 29, 2017
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  14. Calico

    Calico Well-Known Member

    Thanks ! :cat:
     
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  15. evelyb30

    evelyb30 Well-Known Member

    I generally just call something like that RPR - Random Pretty Rock - and don't worry about it much.:) I agree that it's some form of agate though. It has the wrong structure for fossil bone or fossil coral.
     
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  16. Annpan

    Annpan Love all, trust a few, do wrong to none.

    Gorgeous, would love that ocean jasper in a ring.
     
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  17. all_fakes

    all_fakes Well-Known Member

    Yes.
    I've done some rockhounding, and collecting of beach rocks; and it is often not possible to tell exactly what something is; and beach rocks may be mixtures including several forms of chalcedony; jasper, agate, quartz often occur together.
     
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  18. clutteredcloset49

    clutteredcloset49 Well-Known Member

    @all_fakes
    Thanks for the rock tumbler link. I've bookmarked it.
     
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  19. Any Jewelry

    Any Jewelry Well-Known Member

    Yes, chalcedony is the basic stone, grey, whitish grey to bluish grey, usually banded.
    When other minerals are added to the chalcedony, different colours are produced. Then it becomes agate, or in some cases jasper.
    The inclusion in this stone is grey with whitish grey, so the inclusion is chalcedony.
     
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  20. Aquitaine

    Aquitaine Is What It IS! But NEVER BORED!

    @all_fakes .....that link is great!! I checked it out as I have a ring of my Mom's that I wasn't sure about (will post in separate thread!)....looked at "Polished Stone ID" and there it was!!!! SO helpful!!!
     
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