Why this word is great
CRYSTALLOMANCY — [Noun] The practice of divining the future or unseen by gazing into a crystal ball or other transparent solid. From Greek krystallos ("ice, crystal") and manteia ("divination"), it is the art of seeing through clarity itself. Unlike "scrying" (which encompasses any reflective or translucent medium) or "catoptromancy" (which deals strictly in mirrors), crystallomancy is the pursuit of truth in the cold, unyielding purity of mineral. It is the slow swirl of fog in a quartz sphere, the fractured light caught in a shard of obsidian, or the way a fortune-teller's eyes glaze over as they stare into depths that may or may not hold anything at all—a reminder that even the clearest things can obscure as much as they reveal.