Florida beach found "unknown"

[GatorBoy]

This is an impression in a conglomerate stone.
I have never even seen the material in this before.
Some pieces are crystal like.

 

[GatorBoy]

It looks feels and sounds.."when tapped" like stone and not any kind of ceramic or masonary.

 

[rock]

Dang I found a piece of one like it in black last week. Ill post a pic of it tomorrow its in the bed of my truck rite now. I figured it was just too straight of lines to be anything but man made. Mine feels like stone. Found it in slag creek.

 

[GatorBoy]

Yeah post it.
I'm clueless on this piece.

 

[rock]

Well here it is and of course it is broken. It feels like stone cause it is heavy but I really couldnt say for sure. It is a modern piece I am sure of that but dont know how modern. It could be from the slag era maybe to make it but that is just a guess on my part. Hope it helps, rock

 

[GatorBoy]

That IS odd too.
Your ridges are raised looking.
This one isn't.

 

[rock]

Maybe mine is the top plate and you have a bottom plate of whatever it is. 2 different areas of course but maybe the same type of grinder plate for some ancient or historic machine used to grind. I found mine in that creek that I have been finding the white slag. I did however find a piece of a stone bowl which is a good sign.

 

[GatorBoy]

I'm still stumped.
The interior of the impressions on mine are slick..not unlike what I see when a fossil inclusion has popped out of stone? Huh.. no clue.

 

[rock]

I put mine in the "What Section" so far nobody has had but one guess.

 

[Dak]

Floor tiles? Cobble stones?

 

[Plumbata]

Seems to be some sort of worn-down chunk of concrete. Could have been from a driveway with an incline, so the grooves aided traction, or perhaps just from a slab of semi-decorative building facade. In the first pic I thought it mighta been an Indian bead-grinding or dowel/arrow sharpening stone but the later pics seem to indicate it is relatively modern 'crete.

 

[GatorBoy]

I have abbrading stones..and yeah its not that.
I'm thinking masonary is probably going to be it...but.. this is what has me puzzled.
Look closely at the grooves..there is a different layer of material in them you can see a thin outline on the edges of them.

 

[unclemac]

that is a real nice picture and all it does is make it HARDER! is it a uniform thickness?....I have seen old tile with grooves like that for the mastic to hold onto but only on the beaches of Greece and Turkey....old..OLD tile.....

 

[GatorBoy]

I'll take a photo of the edge.
This came from a beach that has at least one shipwreck from across the pond just off of it on the reef.
So... going with the OLD masonary idea it quite possibly could have been ballast or even what's left of a galley brick.
I'm leaning towards your suggestion.

 

[GatorBoy]

I did find a bronze deck spike and pieces of sheathing there in the past.
There are wrecks dating back to the 1500's And up to the 1800's in this general area.

 

[rock]

Try taking it to a tile shop. There should be one on every corner in Florida by now. Thanks, Clinton!

 

[GatorBoy]

Haha.. no thanks.
I lay tile... a tile shop isn't going to know what this is any better than I do.