2nd Picture. Sorry for some reason my computer does not allow me to upload multiple pictures all at once.

3rd picture.

4th picture.

I don't know, but I'd ask on the kitchen forum if you haven't already.

Post a pic of underneath. Looks a lot like a HD laminate.

Hi GreenDesigns:

I thought laminate is just a sheet of the surface layer....my countertop is one piece, it's about 2 inches thick.

Hi Marti8a. I will be posting this in the Kitchen Forum too, thanks.

I'd be shocked if it weren't stone, based on the undermount sink cutout, which is not possible in laminate.
This stone looks to be somewhere on the light end of the Serpentine spectrum.
Casey

Looks like Caribbean Green Granite. Google it for some more images.

Granite, Marble, Limestone, and Travertine are really just trade names and do not necessarily reflect the geological composition of the material.

Hi Aidan:

Yes, stones can look very similar online. However, now I'm more inclined to believe that this is a granite/marble/stone. Not laminate.

That will help me find the sealer for it. Thanks for all your help.

@Sombreuil (Casey) Thank you for your input...really appreciate it.

I don't understand how there can be confusion (at your house; not from a picture online) about whether or not it is stone or laminate. They feel very different (in temperature) when you set your hand on them. Even a really great looking laminate, that LOOKS JUST LIKE granite/stone, when you actually feel it, or set a plate on it, or... will obviously not be granite.

How is it attached to your cabinets? What does the underside look like? (does the pattern wrap all the way under any overhangs? Same texture under all over hangs? etc).

From a picture, we can only guess. If you said, this is a laminate, and here is a picture, we could point you in the right direction. Or, if you said, this is stone, here is the picture, we could point you to some possibilities. But, how can there be any ambiguity, at your house, about whether it is laminate or stone?

It sure looks like a post formed plastic laminate sheet material or something similar.

This is granite/marbles Not laminate.

Here is a link that might be useful: Kitchen cabinets and counter tops