Vallads Posted December 17, 2018 Share Posted December 17, 2018 (edited) Hi, This is my first topic so, if i broke some forum rule or doing something wrong, please tell me, sorry. Also, english is not my native language, im trying to write correctly. Ok, im very very newbie in fossil subject but love science and decided to start my own collection. Well, i found this (pictures bellow). The owner received as a gift and has no extra information, just they came from a north america store's. Well, my main question is: this trilobite is real? What is that in her "head" (cephalon, right?) ? I mean, i know some cracks in fossils are signs of autenthicity but something like that? Maybe the original fossil is missing this part and the preparer tried to fix? Or it's normal? And.. its a phacops? (i know the picture is bad, not focused) How about this ammonite and amber? Are they real ? Thank you very much for any information ! Edited December 17, 2018 by Vallads Link to comment Share on other sites More sharing options...
Malcolmt Posted December 17, 2018 Share Posted December 17, 2018 All look real. Link to comment Share on other sites More sharing options...
Echinoid Posted December 17, 2018 Share Posted December 17, 2018 +1 for all real Link to comment Share on other sites More sharing options...
Ludwigia Posted December 17, 2018 Share Posted December 17, 2018 The first one appears to be a phacopid trilobite from Morocco and the second a Perisphinctes ammonite from Madagascar. The Last one is certainly a Bernstein with inclusions. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Coco Posted December 17, 2018 Share Posted December 17, 2018 Hi, Phacopid AMMONITE ? Drink a second coffee Roger ! Coco 1 ---------------------- OUTIL POUR MESURER VOS FOSSILES : ici Ma bibliothèque PDF 1 (Poissons et sélaciens récents & fossiles) : ici Ma bibliothèque PDF 2 (Animaux vivants - sans poissons ni sélaciens) : ici Mâchoires sélaciennes récentes : ici Hétérodontiques et sélaciens : ici Oeufs sélaciens récents : ici Otolithes de poissons récents ! ici Un Greg... Link to comment Share on other sites More sharing options...
Vallads Posted December 17, 2018 Author Share Posted December 17, 2018 Thank you all for the answers ! But how about the "crack" in trilobite's cephalon? Is it natural or was it filled during the preparation to fix a missing part? I did not know there was a kind of "shallow layer" in the fossil, never seen one like that. @Ludwigia how do you know about ammonite and amber details and origin? They all look very similar to me lol. Link to comment Share on other sites More sharing options...
Ludwigia Posted December 17, 2018 Share Posted December 17, 2018 53 minutes ago, Vallads said: Thank you all for the answers ! But how about the "crack" in trilobite's cephalon? Is it natural or was it filled during the preparation to fix a missing part? I did not know there was a kind of "shallow layer" in the fossil, never seen one like that. @Ludwigia how do you know about ammonite and amber details and origin? They all look very similar to me lol. The "crack" occurred when part of the shell broke and fell off. As far as the others are concerned, I've seen hundreds of those over many decades, so I can recognize them instantly. Believe me. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Vallads Posted December 17, 2018 Author Share Posted December 17, 2018 28 minutes ago, Ludwigia said: The "crack" occurred when part of the shell broke and fell off. As far as the others are concerned, I've seen hundreds of those over many decades, so I can recognize them instantly. Believe me. So, the crack occur before the fossilization process? Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted December 17, 2018 Share Posted December 17, 2018 Here is a Perisphinctes from Madagascar from my own collection, they are pretty freely available. Note the similarity in preservation, colouring, matrix etc. And from my own experience, the trilobite looks real and from the Moroccan Devonian. Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
Vallads Posted December 17, 2018 Author Share Posted December 17, 2018 54 minutes ago, Tidgy's Dad said: Here is a Perisphinctes from Madagascar from my own collection, they are pretty freely available. Note the similarity in preservation, colouring, matrix etc. And from my own experience, the trilobite looks real and from the Moroccan Devonian. Indeed. Thank you for the contribution. Link to comment Share on other sites More sharing options...
Ludwigia Posted December 17, 2018 Share Posted December 17, 2018 6 hours ago, Vallads said: So, the crack occur before the fossilization process? No. Afterwards. You can recognize that because the internal cast which was formed during fossilization is visible where the shell is missing. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Ludwigia Posted December 17, 2018 Share Posted December 17, 2018 14 hours ago, Coco said: Hi, Phacopid AMMONITE ? Drink a second coffee Roger ! Coco Oops! I guess I was fallng asleep at the time. At least I've corrected it now. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Vallads Posted December 18, 2018 Author Share Posted December 18, 2018 Thank you all. Link to comment Share on other sites More sharing options...
Wrangellian Posted December 18, 2018 Share Posted December 18, 2018 Your ammonite is real, but I will point out that the ribs have all been polished a bit where you see they are shiny - Something the Madagascans do to meet export rules, apparently. Not all of them have had this done to them (see Tidgy's Dad's). I consider this damage, and I would try to find one without it before I settle for one with it. A lot of times the aperture has been squared off, too, as Tidgy's appears to be, but yours does not! Link to comment Share on other sites More sharing options...
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