The Navajo Nation is the governing body for the Navajo Indian Reservation which is located in the "Four Corners" of the U.S. Southwest. This explains why so much of the Navajo style is influenced by and still created in Utah, Arizona, New Mexico and Colorado. Silversmithing, often necessary to link turquoise stones together, is an important cultural trade of the Navajo People. This explains why shades of blue are usually present in many Navajo creations, whether it's a home's exterior or a hand-woven rug.