What kind of pearl is that?

[jack86]

During my dinner in Singapore (around 5S$ each) I've found a pearl.
I am just wonder if I can use it as a jewelery? (i.e.: to make a ring), is that worth anything?

 

[CortezPearls]

Howdy Jack,

Seems to be a clam or edible oyster pearl. What did you have for dinner?