Morganite is a type of beryl, which is a mineral that forms in igneous and metamorphic rocks. It is formed through a combination of heat, pressure, and chemical reactions deep within the earth. Most morganite is found in granitic pegmatites, which are large veins of granite that contain high concentrations of minerals such as feldspar, quartz, and mica.
To form morganite, beryl crystals must first be formed within the pegmatite. These crystals then undergo a process of chemical alteration, which can involve the introduction of elements such as manganese and cesium. This alteration process causes the beryl to take on a pink or peach color, resulting in the formation of morganite. The color of morganite can vary depending on the concentration of trace elements within the crystal, as well as other factors such as the lighting conditions under which it is viewed.