FOSSIL ?

[mollymic33]

Hello is there anyone here that can advise me on what I think is a Fossil 

It weighs 1143 g

18cm X 17cm 

It seems that only one photo can be attached

Thank you. 

 Molly

[kopenhagen5]

Select reply and you can add more photos.

Looks like the shape of a Nautilus.

What size is it ?

[mollymic33]

18cm diameter weighs over 1kg

it is about 1" thick 1.5 in some places

[kopenhagen5]

Sorry, just realised you had the size in the OP.

 

Could be about the size of a Nautilus and perhaps coral encrusted or just fossilized.

[mollymic33]

It looks as though it might be an open clam

[kopenhagen5]

Yes looks like you are closer to the mark.

[mollymic33]

Thank you for your replies

[mollymic33]

I found this Prehistoric Clam Shell do you think my one could be like this ?