Fossil ivory is like working with butter when you use water and
scintered diamond drills/burs. It will need polishing w/ white
diamond or blue rouge as a final finish; even used the small silcon
Advantedge (Rio Grande, disclaimer) polishing wheels in the flexshaft
handle. I love the organic quality/look.
When things quite down around here, I’ll post pix of the two
bracelets I created w/ large fossil mammoth/walrus ivory on the
Ganoksin blog. Was lucky enough to find/use a fossil walrus tooth in
one. All the fossil is from Ivory Jack’s (disclaimer) large polished,
but unfinished selection, which I was personally able to rummage
through at Tucson last year.