Alphabet Agate is a unique type of agate that can show the letters of the Alphabet. The cracks that form inside the Agate are filled with different colours and a skilled cutter can fashion the cracks to look like letters. The pebble size agates we find in modern day stream beds with red iron stains are actually the fossil remains of ancient hot spring systems. The different color agate which fills the healed cracks are evidence of different minerals in the hot spring system.
Further Reading