I will treat you like I want to be treated. 
Thank you for your interest in this beautiful Sea Shell.
If you have any inquiries regarding this or any of my other listings, please feel free to contact me.

Hello and welcome! 

: The fossil exhibits strong preservation where the spiral whorls and ridges of the ancient shell are still sharply defined, partly embedded in a hardened sedimentary rock matrix (steinkern or permineralized shell).A beautiful fossil maintaining some definition of the original ridged pattern with some matrix still attached. Stunning piece

Beautiful piece, uniform in colour, and you can still see the beautiful ribbed pattern on the external surface of the seashell. 

found in the river in the Sukabumi area of West Java.
The Sukabumi area of West Java is famous among collectors for Miocene and Pliocene epoch marine deposits. River-sourced specimens like this often have smooth, water-worn outer surfaces from natural river erosion, which makes the coiling highly visible but sometimes strips away fine surface details.
This is a  a traditional calcareously replaced or siltstone-matrix cast.beautifully intact, standard matrix cast

Yours Faithfully
Oceanix.

SN9 

This is not a product from an endangered or 
protected species, neither does 
it come from a live animal.