This is a small, polished palm stone, made from Chevron Amethyst. There are multiple different types of Amethyst, but this one is truly affordable. Chevron Amethyst sometimes has a geometric pattern of the colors purple and white, and then sometimes just parallel lines of the 2 colors.
Measurements: This palm stone is 1.75 inches long and is 1.25 inches wide. You might not receive the exact stone that you see in the picture, but one similar.