Nebraska's State Fossil
The mammoth fossil was designated the state fossil of Nebraska in 1967. Many species of mammoth were believed to cross the Bering Straight land bridge in prehistoric times and spread throughout North America. Mammoth fossils have been found in most Nebraska counties. These mammoths were like huge elephants with giant curving tusks. The mammoth is also Alaska's state fossil.
Nebraska's State Gemstone
Blue chalcedony, better known as blue agate, was designated as Nebraska's state gemstone on March 1, 1967. This stone is pale blue with bands of white and blue. It is often used to make jewelry. You can find this gemstone in northwest Nebraska. It is found in deposits of weathered silt and clay-stone.
Nebraska's State Rock
Prairie agate became Nebraska's state rock on March 1, 1967 along with the state gemstone. It is found throughout Nebraska and in great abundance in the Oglala National Grassland. It can also be used to make jewelry.