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Use "facetting" in a sentence
"The color may also be deepened by giving to the stone a rounded contour, both above and below the girdle, and facetting it in steps instead of in the brilliant form."
"The Gabrielle facetting pattern allows more light return to the eyes face-up, and anecdotally, it makes the Gabrielle look up to 2 grades whiter than the certificate states."
"Similarly, the facetting pattern masks inclusions sufficiently that, anecdotally, lay-persons are unable to see certain inclusions (even down to SI2 or EVEN P1) even with a 10x loupe."