They all are just carbon atoms, but arranged differently—like how the same rice can be sticky or separate. Diamond has each carbon tightly bound in a hard 3D network, graphite is in slippery sheets, and fullerene forms these football-shaped cages. My exam would say diamonds are precious, but in the lab, we curse diamond-tipped saws for being so slow to cut. I've wasted hours waiting on one, thinking how in my mother's shop, a blunt *ktang* knife is just as frustrating.
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