Phantom Quartz is a macrocrystalline variety of quartz. Quartz is the most abundant single mineral on earth. 12% of the earth’s crust is made of quartz. Phantom quartz outlines an earlier stage of formation. Phantoms are usually composed of other minerals like chlorite, goethite, or hematite. They can also be other varieties of quartz which form on most or all of the surfaces of the quartz crystal at a particular point in time during its growth, after which the quartz crystal resumes it’s crystallization enclosing the phantom crystal within itself.