Animal product spoons and Kashrut
Do food service products made from non-kosher sources create a kashrut problem when they are used with food (or even without)?
There are spoons made from mother of pearl (from mollusk shells), used generally for caviar, and there are spoons carved from animal bones. Would using either of these make the food not halachically appropriate? Does it matter if the food is hot or is there a problem with the spoon itself (so even putting an empty spoon in one's mouth would be a problem)?