Question

What parts of clam are likely to be preserved?

Answer 1

The pearl is kept and the edible part of the clam is kept until ate

Answer 2

It is the pearl.

Fun fact. To find how much a pearl is worth will vary depending on size, color, shape, surface quality, the type of pearl it is, were it is from etc.
The average pearl is worth $300 to $1,500.

I hope this helps.