Congratulations, you've discovered a Lapis Gemstone!!
Lapis is a relatively rare semi-precious stone that has been prized since antiquity for its intense blue color.
Lapis is the Latin word for "stone" and lazuli comes from the Persian lāžaward, the name of a place where lapis lazuli was mined. Taken as a whole, lapis lazuli means "stone of Lāzhward".
Lapis was commonly used in ancient Egypt for amulets and ornaments, such as scarabs. It was also used in ancient Mesopotamia by the Sumerians, Akkadians, Assyrians, and Babylonians for seals and jewelry. Powdered lapis was even used as eyeshadow by Cleopatra.
Lapis can be found in Chile, the Soviet Union, the United States, but most significantly from the mountains of Afghanistan.