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Pentazole
Posted (edited)

Hi, please stare at this trilobite that I just snagged and tell me if you would agree with me that it's real, or if you think it's fake. If the latter, I would appreciate your reasons. 

 

Edit: pictures posted properly. Also I ask because I'm still very new at collecting. 

20200328_042214.jpg

Screenshot_20200328-042249_Gallery.jpg

20200328_042150.jpg

Edited by Pentazole
Upload images properly

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Kane

If you could post it here, that would be great. I make it a habit not to download files from people I don't yet know. ;) 

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Huntonia

I would recommend you upload your files directly to the forum, it makes things much simpler. Looking at the photos it is definitely authentic. Hard to tell of their is any restoration, on a specimen this nice I would imagine there is at least some. I don't think it's a Kayserops megaspina however. The spines are way too short, it may be a different species of Kayserops.

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caldigger

I can't even open the files, it just gives an error message.

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Pentazole
18 minutes ago, Kane said:

If you could post it here, that would be great. I make it a habit not to download files from people I don't yet know. ;) 

Sorry, fixed. 

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Tidgy's Dad

Hello, and a very warm welcome to TFF from Morocco. :)

I think Kayserops is correct, but not sure about the species. 

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Pentazole
Posted (edited)
43 minutes ago, Huntonia said:

I would recommend you upload your files directly to the forum, it makes things much simpler. Looking at the photos it is definitely authentic. Hard to tell of their is any restoration, on a specimen this nice I would imagine there is at least some. I don't think it's a Kayserops megaspina however. The spines are way too short, it may be a different species of Kayserops.

Sorry researching as we speak. Metacanthina issoumourensis? 

 

Edited by Pentazole
Clarification

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Pentazole
On 3/28/2020 at 5:31 AM, Fossildude19 said:

Looks real, and nicely prepped! 

I see a little bit of restoration to the tips of the genal spines.

 

 

20200328_042150.thumb.jpg.886af7b9aca827b33927b636811c90a4.jpg   Screenshot_20200328-042249_Gallery.thumb.jpg.266d8a455ffcce2e3da0f08a09e71c42.jpg

Thank you fossildude for the observation, I will keep your comments in mind. 

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aplomado

That is gorgeous!

 

I love the stripe through it!:thumbsu:

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Malcolmt

Nice little bug ... definitely real with very minor restoration

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Pentazole
On 4/3/2020 at 6:45 PM, aplomado said:

That is gorgeous!

 

I love the stripe through it!:thumbsu:

The seller claims that this was a natural crack in the rock, that was cemented over time with minerals, which makes it even more interesting.

 

However, I do not know enough about how these specimens are extracted to be able to tell if this was cut with a saw, or natural fracture.  To be honest even though it cost me more due to the seller's story, deep inside I am 95% convinced it's human error and this specimen was slabbed with a saw.

 

Would anyone care to shed some light on that?

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FranzBernhard
14 minutes ago, Pentazole said:

if this was cut with a saw, or natural fracture.

This kind of trilos is located in very hard limestone. Limestone is smashed into pieces. Whenever cross sections of trilos are found, the pieces are glued back together (or after some further prep). Then air scribe comes to work (mini pneumatic chissel). Later mini sand blasting with soft media. And at the end some restoration, if necessary. Many dozens of hours went into such a specimen. These could not be cheap.

 

Concerning the brown, mineral filled crack, it appears natural to me. There is only a very slim chance, that this is a filled-up saw cut. How does the crack look like in detail? Is it completely straight? How does its filling look like?

 

Franz Bernhard

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Huntonia
44 minutes ago, Pentazole said:

To be honest even though it cost me more due to the seller's story, deep inside I am 95% convinced it's human error and this specimen was slabbed with a saw.

 

Would anyone care to shed some light on that?

Like @FranzBernhard said a closer look could tell the difference, if you could post a close up photo that would help. I believe however that this is a calcite seam, a natural and very beautiful occurence in fossils and rocks in general. If it is calcite it should be crystal like in appearance and may glow under UV light and/or have refractive properties. 

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Pentazole
On 4/14/2020 at 11:50 AM, Huntonia said:

Like @FranzBernhard said a closer look could tell the difference, if you could post a close up photo that would help. I believe however that this is a calcite seam, a natural and very beautiful occurence in fossils and rocks in general. If it is calcite it should be crystal like in appearance and may glow under UV light and/or have refractive properties. 

I guess we will have to continue this discussion at a much later time.  I have not seen this yet, it is being stored in the US until my brother comes to visit me where I live (which was supposed to be now had COVID 19 not happened). 

 

Thank you for all the insight, though.  I feel super amateurish.

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