Beautiful!

Based on the appearance of the rock in the image, it looks like a type of jasper, specifically a variety known as plume agate or plume jasper. This type of rock is characterized by its colorful, intricate patterns that often resemble plumes or feathers, which is evident in the red and green patterns seen in your rock. Jasper is a form of chalcedony, which is a cryptocrystalline form of silica, and it often contains inclusions of other minerals that give it its distinctive colors and patterns.