Turquoise

Turquoise is an opaque, blue to green mineral that is a hydrated phosphate of copper and aluminium, with the chemical formula Cu Al 6 (PO 4) 4 8 4H 2 O. It is rare and valuable in finer grades and has been prized as a gemstone and ornamental stone for thousands of years owing to its unique hue.

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Hopi

The Hopi are a Native American tribe, who primarily live on the Hopi Reservation in northeastern Arizona. As of the 2010 census, there were 19,338 Hopi in the United States. The Hopi language is one of 30 in the Uto Aztecan language family.

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Native American Indian ARROWHEADS The Ultimate

The next step in making stone arrowheads was called pressure flaking. During the pressure flaking process, the Native Americans would place a pointed tool, such as an antler horn, on the edge of the stone and apply an inward pressure to the horn to remove small, thin flakes from the stone.

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