Henrysaurus Posted December 10, 2016 Share Posted December 10, 2016 Hello, We found this rock on a beach in Coffs Harbour, Australia and we're hoping someone may be able to help us identify it. Link to comment Share on other sites More sharing options...
Fossildude19 Posted December 10, 2016 Share Posted December 10, 2016 Welcome to the Forum. Looks like a Septarian nodule , to me. Regards, 1 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
tmaier Posted December 10, 2016 Share Posted December 10, 2016 Yup. Link to comment Share on other sites More sharing options...
fifbrindacier Posted December 11, 2016 Share Posted December 11, 2016 You might want to polish it to make it shiny, it would be very nice. "On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry) "We only well see with the heart, the essential is invisible for the eyes." In memory of Doren Link to comment Share on other sites More sharing options...
FossilGuy1024 Posted December 11, 2016 Share Posted December 11, 2016 Honestly I can’t tell for sure. Are there other patterns or structures that you can’t see from the picture? If so, then it could be something like a Petosky Stone (see below). Regardless, it looks too dark to be a septarian. Also, the shapes are generally hexagonal and I can’t remember seeing anything like this in a septarian. Link to comment Share on other sites More sharing options...
Fossildude19 Posted December 11, 2016 Share Posted December 11, 2016 1 hour ago, FossilGuy1024 said: Honestly I can’t tell for sure. Are there other patterns or structures that you can’t see from the picture? If so, then it could be something like a Petosky Stone (see below). Regardless, it looks too dark to be a septarian. Also, the shapes are generally hexagonal and I can’t remember seeing anything like this in a septarian. I'm not seeing any evidence of any kind of septa or coralites. Color really has no bearing on septarian nodules. See some of the gray to black ones HERE. Also, the shapes are rather common for septarian nodules. Also visible in some of the images linked. Regards, 1 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
tmaier Posted December 11, 2016 Share Posted December 11, 2016 Yup. Link to comment Share on other sites More sharing options...
abyssunder Posted December 11, 2016 Share Posted December 11, 2016 As I see, the specimen is cracked transversally, so I think a view from either of the sides could release the doubt. I'll go with the classical septarian nodule, considering the lack of the above mentioned characters, the gray color of the surrounding matrix and the yellowish of the cracks (calcite infill walls). On the central-right side, the bigger "cell" looks to be octagonal (which is proper to a septarian) compared with the adjacent on left, which is hexagonal. " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
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