what's the main industrial use of diamond ?

Answer 1

Diamonds are used in saws to cut tile or rock, they are used to cut other diamonds. They used to be used in stereo needles that played records (yes, I'm old). Lots of things I think.

Answer 2

Much more than a girl's best friend, the diamond is also a workhorse of industry. It is used in drill bits and cutting tools and to grind optical lenses. Now, efforts are under way to grow the super-hard minerals in the lab. New trend are a diamond coating. Such coating is created by mixing a powder containing microscopic diamond particles, or seeds, with water. Into the solution goes a silicon wafer, treated so the diamond seeds will stick to it. Then the wafer is microwaved in a chamber filled with carbon gases. The intense heat from the microwave breaks down the gases. And since diamonds are made of carbon, the carbon atoms from the gases are naturally attracted to and adhere to the diamond seeds on the silicon wafer, growing more diamond particles.
Once perfected, the researchers say, this technique can be used to coat a variety of surfaces, making them virtually scratch-proof. The future could include everything from diamond-coated kitchens to spacecraft windows.
One such window has already gone into space. An expensive, quarter-sized diamond-coated window endured extreme temperatures and conditions on one of the Pioneer probes to Venus in 1978.

Answer 3

Would you believe cutting other diamonds?