Imagine having a diamond chef's knife whose edge was atomicly-sharp, and would never need honing.Or maybe a razor you can shave with for a year. Personally, I see no end to the potential practical applications of these technologies. Eyeglasses, lightweight armor-piercing ammunition, scratch-proof optical storage media, etc.
There has been a machine capable of making various gems including diamonds since the fifties!
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Ann Francis, woo hoo! DK I hope the picture came out right!