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You can buy a kit like this and have everything you need for $120

Amazon.com: Norton Waterstone Starter Kit: 220/1000 grit stone, 4000/8000 grit stone, SiC flattening stone: Industrial & Scientific

That is not an actual sharpening stone. It is a nagura stone that is used in conjunction with a wetstone.

Read through the "What Hones Do I need" link in my signature to get a better idea what you...

I would guess that is a really low grit stone. These are usually just labelled "coarse and fine".

O.k. for knives, not so good for razors.

What is the stone?