When you throw the bowl for the sink, you have two mounting options:
under the sink, or a drop-in mounting.
I REALLY recommend you look at sinks in the local home centers/kitchen/bath stores. Some of them are upscale hand-thrown sinks, so you can get a good idea from the displays.
If placing it under the counter, use a good quality silicone caulk/adhesive. It's best to have the counter upside-down, and glue the sink in place. Don't disturb it until completely cured, this may take several days!
You MUST use a solid-surface countertop material like granite or composite like Corian, etc. You can't use laminate material, as moisture would attack it in no time flat.
You CAN use laminate countertops if top-mounting the sink, just make sure you seal the edges realy well to avoid moisture creeping under it to delaminate it.
Hope this helps.
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