Crystal Dream™ mobiles are hand crafted to give years of pleasure. The wavelength (distance between turns) and diameter of each aluminum helix precisely matches the diameter of its crystal, to ensure a snug fit and balanced rotation.
An illusion of levitation is created as your eye accepts the rotating helix as a frame of reference. The crystal, carried by the helix, appears to rise as it rotates.
The illusion is strongest when the crystal hangs at eye height. Use the brass hook and nylon line provided with your Crystal Dream™ to suspend it wherever you want to enjoy this illusion.