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.
Save. Beyond exquisite jewelry, diamonds have many industrial uses. Diamonds are the hardest natural substance known that resists scratching. They are used for their durability to cut through many solid materials, including other diamonds.The beauty of how light passes through and shines upon a diamond has made it the favorite choice for jewelry and most popular gem around the world.ave. Beyond exquisite jewelry, diamonds have many industrial uses. Diamonds are the hardest natural substance known that resists scratching. They are used for their durability to cut through many solid materials, including other diamonds.