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Manticocerasman

polishing some of my Goniatites

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belemniten

Very nice Kevin :1-SlapHands_zpsbb015b76: You did a great job! Congrats :) 

 

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Tidgy's Dad

Very pretty! 

Good work. :)

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FranzBernhard

Ah, polished goniatits! Very, very lovely! You did a great job and you have opened up a new "source" of fossil specimens: The discard piles!

Franz Bernhard

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Fossildude19

And a question for the moderators: the fossils have been cut and polished today, but were found earlier this year, are they valid entries for FOTM since al the cleaning , cutting and polishing was done now? 

Thx Kevin

 

The staff will discuss this. 

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ynot

Wonderful that You took a couple of garden rocks and ended up with nice display pieces!:thumbsu:

Congratulations on the successful experiment!:yay-smiley-1:

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Innocentx

Major fun times with your access to machines. Very nice!

 

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Manticocerasman
2 hours ago, belemniten said:

Very nice Kevin :1-SlapHands_zpsbb015b76: You did a great job! Congrats :) 

 

Thx Sebastian.

2 hours ago, Tidgy's Dad said:

Very pretty! 

Good work. :)

Thx T.D. :)

 

2 hours ago, FranzBernhard said:

Ah, polished goniatits! Very, very lovely! You did a great job and you have opened up a new "source" of fossil specimens: The discard piles!

Franz Bernhard

Thx. Indeed, I have a whole box of specimens that will never come out nicely with regular prepwork, I know what I will be doing with those :)

32 minutes ago, ynot said:

Wonderful that You took a couple of garden rocks and ended up with nice display pieces!:thumbsu:

Congratulations on the successful experiment!:yay-smiley-1:

Thx Tony, there will be more to come :)

23 minutes ago, Innocentx said:

Major fun times with your access to machines. Very nice!

 

Thx. I will also experiment with other kind of fossils in the future like corals

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Ludwigia

@Manticocerasman Nice results! It sure can be a relevation when you start cutting and polishing what would often just be rejects when seen from the outside. I started doing this quite a few years ago on the machine I used to use to cut and polish agates after I discovered that fossils can also have interesting internal mineral replacement structures. I did it mostly for the sake of the aesthetic quality of the "slices", as I call them, but it's also instructive viewing the internal structure of not only ammonoids, but also other fossils as well. Corals and sponges, for instance, often need to be cut in order to be properly identified.          

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goatinformationist

This is what I do with 10" slab saws in my basement.  Cheap to buy and easy to use.  Get yours today.

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FranzBernhard
8 hours ago, Manticocerasman said:

Indeed, I have a whole box of specimens that will never come out nicely with regular prepwork, I know what I will be doing with those

 

8 hours ago, Manticocerasman said:

I will also experiment with other kind of fossils in the future like corals

Can not wait... ;) (Some may know that I am a somewhat polished freak ;))

Franz Bernhard

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RJB

Those came out purty dang nice!  From what I would call 'lake skippers' to pieces of art.  Nice job.

 

RB

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Manticocerasman
18 hours ago, FossilDAWG said:

Your goniatites look great when cut and polished that way.  They have been transformed into works of art! :wub: It's a perfect use of otherwise unpreppable discards. 

 

However, from the perspective of fossils as data for paleontology, sectioning and polishing does not add information that would enhance the scientific value of these specimens, for example by allowing them to be identified with greater certainty.  On the other hand, sectioning and polishing corals reveals details of internal structure that are generally required for a confident ID, as well as commonly enhancing the appearance of the specimen. 

 

From the perspective of the FOTM contest, prepping should enhance the scientific value of the specimen by uncovering diagnostic features and by repairing (as in gluing back together) broken pieces.  Of course a good prep job will also enhance the appearance of the specimen, and this will naturally influence how people vote for an entry.  A great prepper has both sublime technical skill and an artist's eye.  However, manipulation of a specimen in a way that improves its appearance at the expense of loss of detail or scientific value will not count as "preparation".  As an example, cutting/polishing pieces of agatized bone so they can be mounted in a pendant would not result in something that could be entered in the FOTM contest, although the result might be beautiful as jewelry.

 

Don

 

I do agree that the polished fossils should not enter the FOTM contest, but I have to disagree on the loss of sientific value on the specimens.

Especialy for paleozoic cephalopods: for the study and identification we often have to refer to destructive methods like cutting them to be able to identify the species of the fossil.

For example Orthocone fossils are cut and polished to determine the shape and position of the siphuncle to make the determinations.

This is also true for the goniatites like Manticoseras, due to the lack of ornamentation on the shells we have to cut them through the microconch and see the shape of the shell to make propper idintifications towards species :

 

mantico.thumb.PNG.d03d9d22867be1e6ca5d99d21a745c75.PNG

 

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JohnJ

Kevin, we are looking more for preparation that reveals the original, external morphology of a specimen (with very rare exceptions) for the Contest.

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Manticocerasman

IMG_20180928_164711.thumb.jpg.8e5fed9abeb01d35925c09eea4cf4836.jpg

 

A new try. This time a double one.

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Manticocerasman

IMG_20180928_164657.thumb.jpg.6dcf96d05ae336bd954eb605dfff0743.jpg

 

and this one. 

he turned out very wel, I got this one right in the middle.

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Innocentx

Um, nice again!

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Bobby Rico

Very pretty indeed. :)

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FranzBernhard

Beautifull! Thanks for sharing!
Franz Bernhard

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doushantuo

Cephalopods from my southern neighbours...lovely:dinothumb:

 

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Manticocerasman

A new Manticoceras sp. that I pollished yesterday.

the original piece was broken, I restored it using special epoxy to glue marble. ( you can see the black crack through the fossil )

They have a lovely colour variation in the chambers ^_^ .

 

The piece was then cut and both sides pollished.

IMG_20190116_153520.jpg.67a43e7d741b2855a02682fc50f4317a.jpgIMG_20190116_153504.thumb.jpg.52a36395695872db9ed20077156bb778.jpg

 

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Manticocerasman

a few extra pollished critters:

IMG_5096.thumb.JPG.a9aea22fcd4aae06ceda67d75be2eac9.JPGIMG_5097.thumb.JPG.1ee0ecb8e8be18592d9807abc59ade2b.JPGIMG_5098.thumb.JPG.21d35bf0b456a50edd68af438f5922af.JPGIMG_5099.thumb.JPG.37a5f4304d5102ee8e42ad8284f7c90e.JPG

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