Phantom quartz is a variety of quartz, or "rock crystal", that forms over pre-existing crystals. The included crystal is visible due to some variation in composition making the boundary of the included crystal visible. Such crystals display the outlines of numerous smaller crystals, known as phantoms.
Phantom crystals are very good for helping us move past blockages, where we may have become “stuck.” The type of inclusion that makes up the phantom also plays a part in the gifts that these special crystals have to offer us. They can also be used to project growth and plan milestones.