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A polished-looking Phacops


Cicija

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I assume this Phacops is real but it looks polished to me. It is an internet auction and before I bid, I would like to hear from experts if everything is alright with him.

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A real specimen. It may have been tastefully enhanced, but I see no red flags.

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...How to Philosophize with a Hammer

 

 

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very cool one, I agree with Kane. Little glaze, looks better

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Careful treatment with an air abrasive can remove the matrix and give this shiny finish.  I don't see obvious signs of a forgery, such as air bubbles or missing detail in the eye lenses.  There is a crack, which has been tastefully repaired, which indicates that the specimen was found by cracking rock, recognizing the trilobite in cross section, gluing the pieces back together, and carefully prepping.  I would be happy to own this specimen.

 

Don

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3 hours ago, FossilDAWG said:

Careful treatment with an air abrasive can remove the matrix and give this shiny finish.  I don't see obvious signs of a forgery, such as air bubbles or missing detail in the eye lenses.  There is a crack, which has been tastefully repaired, which indicates that the specimen was found by cracking rock, recognizing the trilobite in cross section, gluing the pieces back together, and carefully prepping.  I would be happy to own this specimen.

 

Don

It depends. Dolomite more commonly dulls the sheen, whereas a baking soda treatment can impart a bit of gloss  after dolomite treatment, baking soda can be a finisher.

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...How to Philosophize with a Hammer

 

 

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its a wonderful way to prep the trilos like this. Fine finish of the Trilo and a good cleaning of the surrounding. I show a trilo to compare..., with a fine cleaning of the surrounding and the "old way" with chissel marks...

image.thumb.jpeg.cd16f2a6d9ba8b2ac60e182065de672e.jpeg

 

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Nice! 

Personally, whether it is a Moroccan or even a  Penn Dixie bug, blasting at the end with baking soda is a nice finishing touch. Both won't be hurt by it even at higher pressure. Whereas dolomite will burn the shell, baking soda just polishes.

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...How to Philosophize with a Hammer

 

 

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