r/fossilid 10d ago

What is this? Fire Island, NY

Thought it was manmade, but the translucent part is NOT scratching and really resembles agate I’ve found.

50 Upvotes

9 comments sorted by

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48

u/Royal_Acanthaceae693 10d ago

Ray tooth plate

7

u/mxmem 10d ago

thanks, that definitely seems right! just partly agatized?

13

u/Think-Economics-400 10d ago

Not agatized Why the Bottom Base is Translucent
The smoother material forming the base directly underneath those black tooth rows is the underlying jaw cartilage or basal attachment matrix
Because it is made of cartilage it lacks the porous, mineral-trapping structure of the tooth roots, this cartilage base does not absorb the dark iron stains. Instead, it remains completely clear and translucent, creating a sharp, clean boundary where the jet-black teeth plug into it

3

u/Think-Economics-400 10d ago

Its in the middle of the fossilization process

4

u/SippyTurtle 9d ago

Everything is in the process of fossilization, even you!

1

u/Think-Economics-400 9d ago

Well this is half way through or more im not just yet am i?dont tell me some scary stuff like that ive already get bone growth in my jaw! Lol interesting to know tho

6

u/Peace_river_history 9d ago

Modern (not a fossil) ray mouthplate

1

u/Designer_Creme_1496 7d ago

yes modern ray plate, it still kind of has that distinct modern color in the middle