Metamorphic rocks are sedimentary or igneous rocks that have been reworked by pressure, warmth, or perhaps the intrusion of fluids. Minerals and rocks, which glow beneath ultraviolet gentle, usually are perceived for a wonder. Minerals and rocks can entirely transform their hues by remaining subjected to UV light or black https://www.generationgenius.com/videolessons/rocks-and-minerals-video-for-kids/