Diamonds were employed as adornments, cutting tools, and talismans to fend off evil. They were also thought to bring protection in battle. Diamonds were also utilised as a medical remedy throughout the Dark Ages, and were considered to treat illness and heal wounds when consumed.

Diamonds were thought to be Gods’ tears by the ancient Greeks. Diamonds were once regarded to be mystical and powerful stones with the ability to influence the heavens and hearts. Diamonds have been thought to contain a particular power for Kings, Queens, and their subjects for the last 4,000 years.

Diamond has been used to grind and shape extremely hard metal alloys, such as tungsten carbide, for use as machine tool tips since the early 1900s. Fine finishes on optical surfaces, jewel bearings, wire drawing dies, cutting tools, aircraft engine components, and many other objects made of metals, ceramics, polymers, and glass are achieved with diamond polishing powders and compounds. Oil, gas, and mineral exploration and production, foundation testing for dams, buildings, and other structures, masonry drilling, and concrete test sampling all use diamond grit and powder-impregnated rock drilling bits. Roads, grooves in airport runways, concrete, construction stone, bricks, and shapes for furnace linings are all cut with circular metal saw discs with a diamond-impregnated edge.

Electrical and technical industries, such as car, aviation, and shipbuilding, use diamond machine tools. Electronics require very thin diamond-impregnated saw blades to slice fragile metals and crystals. Knives can be sharpened at home with “steels” treated with diamond powder.