Originally, I wanted a tiled curb, but per recommendations from Mongo & Bill Vincent, we did a granite curb instead and are really happy with the way it turned out.

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It CAN be done any of the three ways (solid piece of stone, shower tile, or bathroom floor tile). In most ways, it's a matter of aesthetics. However, the solid piece of stone will also do two things for you. First, if you're getting a glass door, it'll give a solid surface for the door to seal to. Secondly (and most importantly), it'll also give less chance for water intrusion into the curb, especially if it's wide enough to overhang the inside of the curb by a 1/2" or so, providing a drip edge.

But for the record, I DO install them both with 1 piece stone, as well as tile.

We used CaeserStone for the threshold and ledge in our new bathroom shower enclosure. As we were using the same CaeserStone for our vanity tops, we just had our fabricator order extra and cut slab pieces for the threshold and edges. The CaeserStone has worked out great. It's easy to keep clean and provided a solid surface to mount the glass shower panels on.