What is ...

an artifact:
an artifact is an original item produced by American Indian artists in the old days, as for example a traditional quilled bag from the 19th century, but it could also be a contemporary beaded bag with glass beads.

a replica:
a replica is a product based on a Native American art product, made of the same materials like for example braintanned hide or rawhide. But it could vary in colour of glass beads or quills, in size, shape or quality of used materials.

a copy:
a copy is a product repeating the characteristics and even flaws of an specific original Native American art product.

an artifake:
an artifake is a copy that can hardly be distinguished from the original and which is often sold as an artifact. It can be exhibited in a museum instead of the original item.