It's way too heavy to be petrified wood and non metallic

[Hippiehabitat]

I found this five foot under water in Mt Fork River in Oklahoma... approx mile from where the dinosaur skeleton on display in red river museum was found. It's extremely heavy much heavier than petrified wood and when I carried it to museum she said it glowed pink, blue, and green florescence and that it needed to be checked out. She also said it has silver pyrite bursts in some of the round indentations and she hadn't seen anything like it. It's not magnetic at all and has some type of vein thru the center of it's entire length. It has a very unique pattern and I can't find anything exactly like it online. When I first saw it under water it looked almost like a gemstone, dark green in color. And yes it came out of the water shiny like this. It's 7" long and 2 1/2" wide.

 

 

 

[LabRatKing]

This looks like a chert flow stone. It may be a fossil but a polished cross section would be needed for a diagnostic.

[diginupbones]

I’m pretty sure it’s a piece of tusk from a mammoth/mastodon or gomphothere. Some good photos of both ends might help with ID. 

[Hippiehabitat]

I'll try to get some end photos where you can see the detail...with my phone it's going to be easier said than done

[Hippiehabitat]

[diginupbones]

Here’s a similar piece from my collection. The Schrager lines are the diagnostic feature you want to look for in ivory identification. It doesn’t look like they are visible in your find but I am still thinking ivory. @LabRatKing is correct, the only way for a good ID is probably a polished cross section view.

 

[Hippiehabitat]

12 minutes ago, diginupbones said:

Here’s a similar piece from my collection. The Schrager lines are the diagnostic feature you want to look for in ivory identification. It doesn’t look like they are visible in your find but I am still thinking ivory. @LabRatKing is correct, the only way for a good ID is probably a polished cross section view.

 

Thank you, Ill have it checked out.

[LabRatKing]

On 1/17/2022 at 9:15 PM, Hippiehabitat said:

To my eye, then end views do look to have some of the expected indicators of wood, but non fossil chert formations can be tricky when in this morphology.

[LabRatKing]

On 1/17/2022 at 8:55 PM, diginupbones said:

I’m pretty sure it’s a piece of tusk from a mammoth/mastodon or gomphothere. Some good photos of both ends might help with ID. 

By what evidence?

[Ludwigia]

On 1/17/2022 at 9:18 PM, Hippiehabitat said:

when I carried it to the museum she said

 

Which museum? Who is "she"?

[Carl]

Not sure I follow the "heavier than petrified wood" reasoning. Petrified wood comes in many weights, most of them heavy.