A diamond is a metastable allotrope of carbon. It is actually very strong, and one of the hardest substances in the world.

The teeth of the sawfish are often described as diamond-like.[2]

There are diamonds located near a volcanic fissure in Molesville, but it proved to be difficult for the Mole family to approach them, because the heat was so intense because the fissure was spewing blue flames.[3]


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