I followed those links and trapper john has another page of great fossil pearls
LINK
Some of them look like they may be fun to wear. They have kept their pearlescent surfaces, even in fossilization.
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To sum up for Gere. If there is a pearl in that scallop shell it will be very tiny and not nacreous.
HERE is a previous discussion on scallop pearls with pictures. This is what they look like when not fossilized.
If it is from near Mount Ararat, it is not salable because it is against the law to take or sell fossils from that area.
Look through the links in the post above to get an idea of the market value on nacreous fossil pearls and know that your fossil will be worth less. if legal, because it will never be a pearl from a pearl oyster with a shiny pearly skin.
Also notice these fossils are certified as real fossils by AGTA. Some kind of certification is necessary for such a pearls to be sold.
LINK
The pearl in a scallop shown above is a non-copyright stock photo and it represents a photo shop compilation by someone who knows NOTHING about where pearls come from. The above picture may be your dream of what's inside, but it is impossible in nature for that to happen. The shell is not from a pearl oyster and I think the pearl is probably fake.
I think you and whoever found that scallop got all excited and think it is worth something. The truth is it is not worth much- and if it is illegally gotten, it represents nothing but trouble for you.