Pearls in clams?

[Gloria]

I was eating little neck clams that my husband and I steamed ourselfes
and found a pearl inside one of them.
The shell it cam out of had a deformation in it.We never heard of a
pearl coming from a clam. Can you tell us anything about this and is the
pearl worth anything?
Gloria

 

[jshepherd]

Although rare, pearls are found in clams. But as these 'pearls' contain no nacre the value is typically quite low.

These pearls can grow very large. The largest I have heard of is 'The Pearl of Allah', which is an astounding 9.5-inches in length.