AkerCS Posted September 16, 2019 Share Posted September 16, 2019 Hello friends, I want to know if this specimen is real. It seems original to me. Thank you. Link to comment Share on other sites More sharing options...
Bobby Rico Posted September 16, 2019 Share Posted September 16, 2019 It looks pretty nice to me and real . The displacement of some of the bones is a good sign . I have added a post with a good visual aid for you to make a comparison. Wait to get a second opinion before buying . Cheers Bobby 2 Link to comment Share on other sites More sharing options...
AkerCS Posted September 16, 2019 Author Share Posted September 16, 2019 (edited) @Bobby Rico Thank you very much for your comment. The bones of your specimen look similar to those in my photos, with clear and porous parts. Edited September 16, 2019 by AkerCS Link to comment Share on other sites More sharing options...
Pemphix Posted September 16, 2019 Share Posted September 16, 2019 I thin it's a poorly prepped specimen (acid, metalbrush/grinder). If you zoom in you can see a greenish halo around the bones - looks strange... @Crazyhen may have an explanation... 1 Link to comment Share on other sites More sharing options...
AkerCS Posted September 16, 2019 Author Share Posted September 16, 2019 Hi @Pemphix, I thought it was a medium preparation. since I've seen much worse. I assumed that the color difference was due to the acid. thanks for your comment. 1 Link to comment Share on other sites More sharing options...
Bguild Posted September 16, 2019 Share Posted September 16, 2019 Looks real to me. I like the lack of added digits to the hands/feet. Looks like real bone as well. Agreed, that there's certainly much worse prepped specimens out there. If the price is right I'd go for it 1 Link to comment Share on other sites More sharing options...
Bobby Rico Posted September 16, 2019 Share Posted September 16, 2019 58 minutes ago, AkerCS said: color difference was due to the acid. Been an digital artist and having a lot of experience with printing and colour matching . I would consider the green tint around the bones just as light reflecting and only visible by the digital camera. . This can happen if the specimen has been photographed in artificial light. This can be proven by the second and third photo you posted. Picture two has little of the green tint and picture three as more. I think by the naked eye it would look normal in colour. It is probably good to wait on for a couple of more members to come along. Cheers Bobby 1 Link to comment Share on other sites More sharing options...
Pemphix Posted September 16, 2019 Share Posted September 16, 2019 1 hour ago, AkerCS said: I assumed that the color difference was due to the acid. Maybe yes. But following my experience you see that green colour where resin was in contact with acid. Not saying it is like that, could be like Bobby said, too. In my opinion it is not a good preparation cause after "preparation", a lot of bone material is obviously missing. So a lot of the fossil have been destroyed already. This should not the result after a good preparation-job. The striations around the bones came from mechanical "preparation" and are not nice. And yes, there are much more ugly specimens, but those cannot be named as having preparation at all, IMO. 1 Link to comment Share on other sites More sharing options...
AkerCS Posted September 16, 2019 Author Share Posted September 16, 2019 27 minutes ago, Pemphix said: Maybe yes. But following my experience you see that green colour where resin was in contact with acid. Not saying it is like that, could be like Bobby said, too. In my opinion it is not a good preparation cause after "preparation", a lot of bone material is obviously missing. So a lot of the fossil have been destroyed already. This should not the result after a good preparation-job. The striations around the bones came from mechanical "preparation" and are not nice. And yes, there are much more ugly specimens, but those cannot be named as having preparation at all, IMO. You are right that parts of the bones have been destroyed, but it is difficult to find an original specimen with good preparation at a good price. Link to comment Share on other sites More sharing options...
Crazyhen Posted September 16, 2019 Share Posted September 16, 2019 Poorly acid/mechanically prepped specimen, as suggested by @Pemphix, the bones appear porous because much of the bones were digested by acid and thus the eroded surface. It is likely that this specimen were soaked in acid for too long. Below I show a slightly better acid prepped specimen for comparison. The minerals of the matrix, especially "white" plate, after chemical reaction with the acid, would sometimes produce a greenish colour compound. 3 Link to comment Share on other sites More sharing options...
AkerCS Posted September 17, 2019 Author Share Posted September 17, 2019 Thank you very much to all. you have been a great help. Link to comment Share on other sites More sharing options...
Pemphix Posted September 17, 2019 Share Posted September 17, 2019 On 9/16/2019 at 7:58 PM, Crazyhen said: Poorly acid/mechanically prepped specimen, as suggested by @Pemphix, the bones appear porous because much of the bones were digested by acid and thus the eroded surface. It is likely that this specimen were soaked in acid for too long. Below I show a slightly better acid prepped specimen for comparison. The minerals of the matrix, especially "white" plate, after chemical reaction with the acid, would sometimes produce a greenish colour compound. Nice one, i like the juvi next to the big one ! Thankx for having a look... Link to comment Share on other sites More sharing options...
Crazyhen Posted September 17, 2019 Share Posted September 17, 2019 15 hours ago, Pemphix said: Nice one, i like the juvi next to the big one ! Thankx for having a look... And look at the abdomen of the adult, there are dark patches which are remnants of embryos, though sadly the poorly prepped job ruined the details. Link to comment Share on other sites More sharing options...
Pemphix Posted September 18, 2019 Share Posted September 18, 2019 12 hours ago, Crazyhen said: And look at the abdomen of the adult, there are dark patches which are remnants of embryos, though sadly the poorly prepped job ruined the details. Cannot zoom in , but i know that they were found with embryos. Nice ! Link to comment Share on other sites More sharing options...
Bobby Rico Posted September 18, 2019 Share Posted September 18, 2019 More likely the digestive system because I seen many specimens with the same dark markings on the abdomen. Link to comment Share on other sites More sharing options...
Pemphix Posted September 18, 2019 Share Posted September 18, 2019 Could be both.... https://www.nature.com/articles/nature03050 https://www.jstor.org/stable/20627051?seq=1#page_scan_tab_contents Difficult to tell with ability to zoom in that area of the photo.... 1 Link to comment Share on other sites More sharing options...
Crazyhen Posted September 18, 2019 Share Posted September 18, 2019 11 hours ago, Bobby Rico said: More likely the digestive system because I seen many specimens with the same dark markings on the abdomen. You are right, some are digested food. For embryos, one could however clearly see the skeleton of embryos. Link to comment Share on other sites More sharing options...
Bobby Rico Posted September 19, 2019 Share Posted September 19, 2019 6 hours ago, Crazyhen said: You are right, some are digested food. For embryos, one could however clearly see the skeleton of embryos. Wow I would love it see a photo in close up and you definitely got a fantastic specimen here. Link to comment Share on other sites More sharing options...
Crazyhen Posted September 20, 2019 Share Posted September 20, 2019 This is another specimen with embryos, not mine though (it's too expensive). Note the newborn next to the female adult. 3 Link to comment Share on other sites More sharing options...
Pemphix Posted September 20, 2019 Share Posted September 20, 2019 Very cool Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now