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Oh my What did the one sold to the Russian museum sell for??? Have you tried to contact them?? Honestly I could not even venture a guess on this one maybe someone else here could. I would definitely have an appraisal done for insurance purposes & insure it ASAP.
Worth is anyone's guess. It appears to be oriental in design but again, that's just a guess. Is it signed? How long is it? True value could probably only be assertained by an auction of people wanting it.
I'd agree with D&b on the Elephant tusk , carving origin .It's unusual that it is not signed , however .Is there a hallmark on the gold ?
Your best bet is to have it appraised by someone in the know (if you don't know what museum has it).Should be worth quite a bit if in fact it can be verified it was from a mammoth! They used to have lots of museums in FL growing up with Mammoth remains due to the phosphate industry and mining around there. Valuable stuff!!!!!!!!!!
Agree with Wendy....you need to speak with a reputable auction house (not your local pawn shop).If it is real mammoth.....you have some $$$$ there!