Aeronautics (from the ancient Greek words á½°Î®Ï ÄÄr, which means air, and Î½Î±ÏÏÎ¹ÎºÎ® nautikÄ which means navigation, i.e. navigation into the air) is the science or art involved with the study, design, and manufacturing of air flight capable machines, and the techniques of operating aircraft and rockets within the atmosphere.
Diamond-like substitutes, including cubic zirconia, a crystalline compound synthesized from the elements ziconium and oxygen, attempt to mimic this light-dispersing property, though they fall short of diamond's brilliance and unrivaled hardness.
âWhile you must cut a diamond to make a shape, the shape is essentially the overall geometry or form of the diamond (round, square, etc.), while the cut is the diamond's facets and proportions -- the things that give diamonds their brilliance and fire.â (The Knot)