Could this be possibly a pearl?

[Jethro]

I found a shell thingy on one of the beaches in southern Cebu. It's weight is unusual for its size. It's dense. I tried to put it on a flashlight and this is what happens.

 

[Pearl Dreams]

I'm just not seeing anything pearl-like but let's wait for other opinions.

 

[ennui]

I don't think it's a pearl. If it's dense, I'm guessing rock. Maybe a moonstone?

 

[jshepherd]

It definitely doesn't look like any type of pearl.