What do I have here?

[Kgossage214]

I used google photos and Mustika Pearl came up more than anything else.
Can anyone confirm and provide more info?
It’s a heavy little guy!
Thanks

 

[Yens]

Looks like a rock to me.

 

[StarryPearl]

I kinda want to cut it open using a table saw and see if there's jadeite or agate inside...

 

[CortezPearls]

If too heavy to be a pearl...not a pearl. Looks like a rock to me.