Stone found with crystal swirl

[Leoni86]

Any information on this rock I’ve found at my local beach.. the swirl is full of crystals 

[Tidgy's Dad]

Calcitic preservation of an ammonite's whirls. 

Lower Jurassic, by the looks of it. 

Might possibly be a gastropod, though I doubt it.

Which beach, or the area if possible, please? 

Edited May 31, 2022 by Tidgy's Dad

[Leoni86]

I found it on Fleetwood beach Lancashire in the uk.. it’s like quartz or something slight indent in pattern in the rock

[Leoni86]

[Tidgy's Dad]

It's likely to be calcite rather than quartz, as this is the usual preservation in such cases and calcite is softer than the limestone matrix, so you get  slight indentation whereas quartz would be slightly harder and be raised up above the rock.

[Leoni86]

Thank you for your information.. I put it on another site and had a lot so bad reactions saying it’s not natural and that 

[Tidgy's Dad]

1 hour ago, Leoni86 said:

Thank you for your information.. I put it on another site and had a lot so bad reactions saying it’s not natural and that 

It is definitely a fossil. 

Always happy to help. 

[TqB]

It's a gastropod in Carboniferous limestone, preserved in calcite. Not ammonite - the solid circle in the middle is typical.

[FranzBernhard]

3 hours ago, Leoni86 said:

a lot so bad reactions saying it’s not natural and that 

I can partly understand this reaction!

 

Your fossil gastropod specimen is highly regular and aesthetic. Art from mother nature at its best ! Good find, congrats!
Franz Bernhard

[Sjfriend]

My first thought was gastropod and fake lol. It's too perfect. I believe real gastropod but it just looks so perfect lol