Yellow stones in the stool

[Afnan]

Hi my friends
I have a female greek tortoise she is eating and sleeping well. But today I noticed she has this yellow stones in her stool and one of them were broken from the half I saw three of them.(attached the picture)
I have her for 14 years now, This is the first time I see something like this and I don’t know what to do.

 

[Ink]

Maybe @Yvonne G might know. It almost looks like a seed.

 

[Yvonne G]

Looks sort of like a tick. At any rate, it's probably something she ate.

Take it to your county Ag Extension to see if they recognise it.

 

[Tom]

Looks like a corn kernel.