Mount Rushmore blackstone (Black Hills) U.S.A Medium size stones.

Mount Rushmore and the surrounding Black Hills (Pahá Sápa) are considered sacred by Plains Indians such as the Arapaho, Cheyenne, and Lakota Sioux, who used the area for centuries as a place to pray and gather food, building materials, and medicine. The Lakota called the mountain "Six Grandfathers" (Tȟuŋkášila Šákpe), symbolizing ancestral deities personified as the six directions: north, south, east, west, above (sky), and below (earth). In the latter half of the 19th century, expansion by the United States into the Black Hills led to the Sioux Wars. In the 1868 Treaty of Fort Laramie, the U.S. government granted exclusive use of all of the Black Hills, including Six Grandfathers, to the Sioux in perpetuity.Rushmore Blackstone (From Rushmore mountains) U.S.A. Medium size stones. The Mount Rushmore National Memorial is a national memorial centered on a colossal sculpture carved into the granite face of Mount Rushmore (Lakota: Tȟuŋkášila Šákpe, or Six Grandfathers) in the Black Hills near Keystone, South Dakota, United States. Sculptor Gutzon Borglum designed the sculpture, called Shrine of Democracy, and oversaw the project's execution from 1927 to 1941 with the help of his son, Lincoln Borglum. The sculpture features the 60-foot-tall (18 m) heads of four United States presidents: George Washington, Thomas Jefferson, Theodore Roosevelt, and Abraham Lincoln, chosen to represent the nation's birth, growth, development and preservation, respectively Mount Rushmore attracts more than two million visitors annually