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.
Synthetic diamonds of various colors grown by the high-pressure high-temperature technique. Synthetic diamond (also known as cultured diamond or cultivated diamond) is diamond produced in an artificial process, as opposed to natural diamonds, which are created by geological processes.or economic reasons, the growth of most synthetic diamonds is terminated when they reach a mass of 1 carat (200 mg) to 1.5 carats (300 mg). In the 1950s, research started in the Soviet Union and the US on the growth of diamond by pyrolysis of hydrocarbon gases at the relatively low temperature of 800 Â°C.