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Ammonites


Plaroig

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Hi Everyone!

I have these wonderful Ammonites for about 15 years now and I would like to have their ID. Also an estimated value. Each of them is about 5 kg. and as shown in the picture,

41 cm.

Thank you so much.

Sergio.

IMG_0815.JPG

IMG_0816.JPG

IMG_0817.JPG

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Fossildude19

Per our Rules and Community standards, the Forum does not offer estimates of monetary value. 

These look like Moroccan Ammonites, with the typically carved inner whorls. 

Maybe Mantelliceras sp? 

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No discussion of value on here :i_am_so_happy:

I’m sure someone will be able to suggest a species though 

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4 minutes ago, Fossildude19 said:

typically carved inner whorls. 

Carved by a person to add detail?

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Fossildude19
1 minute ago, dhiggi said:

Carved by a person to add detail?

 

Yes.  The inner whorls are frequently obliterated by extraction, and tend to get new whorls carved into them, to make them more sellable. 

You can usually see it when you are looking for it. 

 

@Ludwigia

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Fossildude19

Sales can only be discussed in our Member to Member Sales Forum. 

Access to which is a delayed permission, given to members in good standing with enough substantive posts.

Please check online Auction sites for similar for price comparisons. 

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Sadly, these appear to be entirely carved...in essence, paleo art.

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Fossildude19

Here is what I am seeing. 

 

IMG_0815.thumb.JPG.b99f59f99e1fb86880d3af4486b629e7.jpg   IMG_0816.thumb.JPG.bee662280468a06c55a060b9cd64a660.jpg

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  Yeah, very much carved, but they were a gift and they belong to you so who cares what they are worth?  Right?  

 

RB

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I'll join the queue for extremely carved. Typical Moroccan Mantelliceras.

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10 hours ago, dhiggi said:

Carved by a person to add detail?

The point is the ammonite shell is not homogeneous. The outside whorl is the body chamber, which becomes empty and instantly filled with mud. The inner whorls are the phragmocone, containing numerous chambers and normally filled with gases to provide buoyancy. Most of it is often preserved in a different way. Sometimes the inner whorls fosilize nicely while the former body chamber is squished or lost, sometimes otherwise. If the inner whorls are not preserved, they could be carved. Another funny detail is that the shell often changes sculpture with adult animals, for example the outer whorl of a female is usually much smoother than the inner ones. So if you carve the center according to the outer whorl, the ammonite is double-faked:D

 

The body chamber is squished here (not all of it survived)

IMG_20191230_140028.jpg

 

The other way round

IMG_20200421_155843.jpg

 

Here the phragmocone is preserved differently...

IMG_20200601_182243.jpg

 

....and usually lost, so you can fill the center with matrix and carve what you like

IMG_20200602_135852.jpg

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Thanks RuMert for the informative post.  I'll just nit-pick a tiny bit and point out the spelling is "phragmocone", sounds the same but "ph" instead of "f".

 

Don

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Strange, I checked the spelling previously. Turned out it was Portuguese:) Corrected

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