Is this coralline algae?

[KING KONG]

Found this rock under the sand(don't know from where i got this). Is this coralline on it?

 

[SchrutesReefs]

Almost looks like a putty or epoxy. But then some parts of the rock look like there could be some spotting.

 

[KING KONG]

Almost looks like a putty or epoxy. But then some parts of the rock look like there could be some spotting.

Okk thx