Looks like seashell.
Looks like an Asian top piece/head for a walking stick, see example......
If the price on the tag is correct,the price of the bracelet is $2.75.
You can check Hugo Kohl,he has been in business for many years.... https://hugokohl.com/
It looks like it was poorly cast with surface bubbles and full of porosity,I'm surprised it wasn't tossed into the scrap bin and not "sold".
Take some good photos when you receive the piece,I would not say the piece is "costume" until the metal has been checked for purity. It appears to...
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