Strange stone

Please post any finds here that you wish help with identification.
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Mac91
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Strange stone

Post by Mac91 » Mon Jul 09, 2018 10:40 pm

Hi all,

I came across this a couple of months back while digging up a signal. I thought it odd at the time and threw it in the back but only recently cleaned it.

Anyone have ideas on it? As far as I'm concerned it's not natural, as a landscaper by trade I haven't came across something like this in our area. In case the pictures don't show it well, it is a half sphere, approx 7cm in diameter.

Thanks! ::g
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Re: Strange stone

Post by Ladybird66 » Mon Jul 09, 2018 11:05 pm

It is curious. Looks like a man made compound of some sort. Not a clue if it had a specific purpose. Maybe just what was left. Is it lime mortar ?

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Re: Strange stone

Post by oldartefact » Mon Jul 09, 2018 11:12 pm

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Re: Strange stone

Post by Ferrous1 » Tue Jul 10, 2018 8:13 am

A muller perhaps? For grinding grain or other materials on a quern stone, https://finds.org.uk/database/artefacts ... /id/624935 :) .
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Re: Strange stone

Post by roamingrob » Tue Jul 10, 2018 8:37 am

Umm.. I am not convinced its for grinding, even the one on PAS looks odd. Thought it would be smoothed if used by hand ? Could be what OA says if so well done you have the oldest find of the year at 165 million years old ::g My firt thought was a cannon ball split in half

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Re: Strange stone

Post by meadowman » Tue Jul 10, 2018 4:48 pm

Hi mac91, apologies for trumping? Your stone, this was found round the back of the house
Near a hedge, eyes only.

Yor post reminded me of my stone which I use as a paperweight, be nice to think that both have some age ::g

Again, apologies, and your post was very interesting ::g
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Re: Strange stone

Post by Mac91 » Tue Jul 10, 2018 11:48 pm

Thanks all for the suggestions. All I can say is it's not a sea urchin (as I found one last year at work!. My first thought was a split cannon ball, however I didn't think a stone one would split so cleanly.

Very similar indeed meadowman!

cheers

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Re: Strange stone

Post by Rhumours » Wed Jul 11, 2018 9:09 am

I have one too .... mines made of granite and slightly bigger than the two previous examples. Found in the garden of my old .... very old .... house. I assumed grinding stone which is the most common sense idea but mine also has a slot down the middle of the domed bit. The slot follows the contours of the dome so it has a phallic look to it .... I suspect it was a grinding stone of blade sharpening stone ... the slit created by removing nicks first before putting a keen edge on the blade.
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Re: Strange stone

Post by sweepstick47 » Wed Jul 11, 2018 9:24 am

I like that idea, it would be a practical solution for maintaining a blade in good order.
Whatever it turns out to be, in the meantime it's a great discussion piece ::g Regards ss47
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Re: Strange stone

Post by Machinist » Wed Jul 11, 2018 10:03 am

Looks like a pumice stone to me.

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Re: Strange stone

Post by SuperRed » Wed Jul 11, 2018 10:37 am

Machinist wrote:
Wed Jul 11, 2018 10:03 am
Looks like a pumice stone to me.

Ray
I did wonder that. Is it light to hold?
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Re: Strange stone

Post by oldartefact » Wed Jul 11, 2018 5:21 pm

Its all there in the opening pic ... the lateral row of nodes is screaming "sea urchin" .. sometimes the smallest of marks can reveal the bigger picture. As said its all there in the opening pic..
And a very nice find it is too.
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Re: Strange stone

Post by littleboot » Wed Jul 11, 2018 5:39 pm

I don't think it's a sea urchin myself. I have found several and they are not as uniform in shape as this. It does look like pumice ...so does it float? If it does then it is.

I wonder about a grindstone because the hand held ones I have found tend to not be worn uniformly but are very much showing wear on one side.
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Re: Strange stone

Post by oldartefact » Wed Jul 11, 2018 5:58 pm

littleboot wrote:
Wed Jul 11, 2018 5:39 pm
I don't think it's a sea urchin myself. I have found several and they are not as uniform in shape as this. It does look like pumice ...so does it float? If it does then it is.

I wonder about a grindstone because the hand held ones I have found tend to not be worn uniformly but are very much showing wear on one side.
I bow to your greater wisdom Jan... but the nodes, how are these explained?
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Re: Strange stone

Post by littleboot » Wed Jul 11, 2018 8:38 pm

I don't node....
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Re: Strange stone

Post by Oxgirl36 » Wed Jul 11, 2018 8:45 pm

littleboot wrote:
Wed Jul 11, 2018 8:38 pm
I don't node....
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Re: Strange stone

Post by Oxgirl36 » Wed Jul 11, 2018 8:50 pm

oldartefact wrote:
Wed Jul 11, 2018 5:21 pm
Its all there in the opening pic ... the lateral row of nodes is screaming "sea urchin" .. sometimes the smallest of marks can reveal the bigger picture. As said its all there in the opening pic..
And a very nice find it is too.
Having seen and held a few sea urchin fossils I can assure you the colour, texture and shape of this is all wrong.

Whatever it is, natural or man made I expect we’ll be guessing at it’s use. Certainly it’s the same size and shape as a darning mushroom head. Maybe it’s for darning socks (before they thought of adding a handle) or a thousand other possibilities that would never occur to us today because the tasks and uses have been lost in the realms of time :(
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Re: Strange stone

Post by Steve_T » Wed Jul 11, 2018 9:09 pm

Stone tool for grinding corn, berries or nuts either for food or used to grind things for dyeing cloth, it would fit in the hand nicely

Just another thought as it almost looks like it's been formed for some sort of use, unless it is just a naturally occurring stone or fossil

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Re: Strange stone

Post by oldartefact » Wed Jul 11, 2018 9:46 pm

In trying to nail an ID it would help to know the rock type, and where it was found.
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Re: Strange stone

Post by Mac91 » Wed Jul 11, 2018 10:39 pm

the 'nodes' in the picture is just the light catching it, apologies as I struggle to get decent lighting. It's not definitely not a sea urchin or pumice, other than that I'm clueless! Has a good bit of weight to it, and relatively easily marked (starting to think a compound or so as previously suggested?). Not too great with my geology all the same.

Found in well inland in Derry if that is of any help.

Thanks!

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Re: Strange stone

Post by oldartefact » Wed Jul 11, 2018 10:53 pm

Mac91 wrote:
Wed Jul 11, 2018 10:39 pm
the 'nodes' in the picture is just the light catching it, apologies as I struggle to get decent lighting. It's not definitely not a sea urchin or pumice, other than that I'm clueless! Has a good bit of weight to it, and relatively easily marked (starting to think a compound or so as previously suggested?). Not too great with my geology all the same.

Found in well inland in Derry if that is of any help.

Thanks!
Interesting stuff on your local geology here, I'll see what else I can find.

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Re: Strange stone

Post by chillidog » Thu Jul 12, 2018 8:09 am

could be one of these
https://ibb.co/jMA6bo
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Re: Strange stone

Post by oldartefact » Thu Jul 12, 2018 6:39 pm

chillidog wrote:
Thu Jul 12, 2018 8:09 am
could be one of these
https://ibb.co/jMA6bo
Good similarity ... but what is "one of these"?
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Re: Strange stone

Post by chillidog » Fri Jul 13, 2018 8:59 am

roman cannonball,try this link half way down page you will see something like yours
https://www.planetware.com/tourist-attr ... n-tc-c.htm
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Re: Strange stone

Post by detectorman5050 » Sun Jul 29, 2018 4:06 pm

I was out metal detecting yesterday, and found something similar while digging up a signal. I only kept it as I remembered looking at your post some weeks ago.

I don't know if mine is a natural occurring stone, or man made, it's not as perfectly formed as yours, and bits are missing to the rear. It was found in a rural field. It would have had a diameter of nearly 40mm if intact.
weird-stone.png
weird-stone2.png
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Re: Strange stone

Post by Oxgirl36 » Sun Jul 29, 2018 4:26 pm

Just a thought but if the urchin fossils were used as pound butter weights (they were) then what do these stones weigh? They could be weights :-/
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Re: Strange stone

Post by oldartefact » Sun Jul 29, 2018 4:32 pm

detectorman5050 wrote:
Sun Jul 29, 2018 4:06 pm
I was out metal detecting yesterday, and found something similar while digging up a signal. I only kept it as I remembered looking at your post some weeks ago.

I don't know if mine is a natural occurring stone, or man made, it's not as perfectly formed as yours, and bits are missing to the rear. It was found in a rural field. It would have had a diameter of nearly 40mm if intact.

weird-stone.png

weird-stone2.png
So much depends on the rock type, are you able to give an opinion? Where in the UK was it found?
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Re: Strange stone

Post by detectorman5050 » Sun Jul 29, 2018 4:32 pm

Oxgirl36 wrote:
Sun Jul 29, 2018 4:26 pm
Just a thought but if the urchin fossils were used as pound butter weights (they were) then what do these stones weigh? They could be weights :-/
Mine weighs approx.35g, but it's a bad example as it's apparently incomplete (if it is indeed man made.)

Here is close up photo of the stone. A random guess, could it be un-polished granite?

@Old Artefact, it was found on the West Coast of Scotland, some miles from the sea.
weird-stone3.png
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Re: Strange stone

Post by oldartefact » Sun Jul 29, 2018 6:48 pm

It its granite ... then we can 100% rule out a fossil.
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Re: Strange stone

Post by detectorman5050 » Sun Jul 29, 2018 7:04 pm

oldartefact wrote:
Sun Jul 29, 2018 6:48 pm
It its granite ... then we can 100% rule out a fossil.
Interesting. I was going to say that I don't think granite is found in this locality, however after referring to an old book, supposedly it is.
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