Should you come across an irresistibly beautiful crafted white object in an antique store, can you trust the dealer’s word regarding its composition? Museum curators and the US Fish and Wildlife Service also have vested interests in bone vs. ivory. How can you tell them apart?
Then, disregarding size and shape, consider its context. If the object came from an 18th Century royal treasury and is encrusted with emeralds, it is likely ivory. If it is flat and fully painted with a scene or portrait, it is likely bone, since probably nobody would paint over precious ivory. That would be like wrapping a nice gold tray in aluminum foil. If the treasure was unearthed from a Native American mound in Illinois, far from elephant and marine mammal habitats, most likely it is bone, although it could conceivably be a prehistoric mammoth tusk.
Then there is the hot pin test. A pin point heated red hot and touched to an inconspicuous area on an ivory object will not affect it. On bone, the hot pin is said to produce an aroma of “burning hair.” This may be helpful if you know what burning hair smells like.
Perhaps it is better to have a professional, who does not have a vested interest in the answer, appraise the treasure. In the past, I can imagine that many bone objects were promoted to unsuspecting souls as ivory. With few and diminishing exceptions, there are stringent bans on the international sale of ivory; and in a growing number of states, including California, New Jersey, New York, Washington, and Hawaii, trade in ivory is banned altogether. So now an unscrupulous dealer might try to jettison his no-longer-marketable ivory objects by labeling them bone.
I wondered if that was the case when I saw a graceful backscratcher in an antique shop just across the river from the Louvre. The dealer said that it was old and made of bone and named a hefty price. It was finely crafted, quite smooth to the touch, and without any dark dots or dashes. Based on its size and shape, it could have been either bone or ivory. My uncertainty combined with a mental image of the US Fish and Wildlife Service marching me off to the slammer led me to leave it alone. “I’ll have to find another gift. Do you have anything in bone? You sure it’s bone?”
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