I ran a group buy for Lucid Diamond samples a few years back -- Sun-Fly had a minimum order size of 200 chips total (we bought about 50 sample sets).
The Polyclay line of chips have full-face printing on a ceramic blank that contains mold markings (either cards, diamonds, or a custom mold for $4k) along with a molded center ring depression (which can enhance the appearance that it's not a full printing).
The chips feel, sound, and handle better than stock ceramic chips (I have a review posted around here somewhere), although the newer 43mm hybrid chips are even better (the 39mm hybrids are about a wash, since they weigh less).
I think that the diamond mold markings are nicely done, although I personally feel that the card mold looks a little cheesy. If getting customs (vs one of Sun-Fly's stock offerings), you can use the diamond mold with any artwork, or even have them make a custom mold with unique mold markings per your specification.
CLIFFS: Better than stock ceramics, not as nice as hybrids, and custom molds are available. And like most Sun-Fly products, a group buy purchase is where the real benefits kick in -- discounted quantity pricing and spreading the significant overseas air shipping cost across many chips can drive the final costs way down compared to an individual order.