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It isn't Northwest Coast Native, or Inuit, for many reasons; but there are native and non-native artists in the plains and SW who do work like...
Yes; the technique apparently originated in the Canary Islands (see "Tenerife baskets") and was later adopted by a number of Native American...
I've seen them sold in import shops as stands for Middle-Eastern metal trays - my Mom had some; they may still be in my basement.
Yes; cast items, basic material is plaster, with a top-coat to give gloss and hardness; manufactured by Wolf Enterprises (WE) and a dozen others.
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