Compared to other parts of the body, yes.
Compared to diamond or some rocks, no.
The hard surfce on the surface of a tooth is enamel.
The hard surface of the tooth is made of enamel which is the hardest tissue in the human body. Tooth enamel has no living cells so unlike a broken or fractured bone the body has no way to repair chipped/cracked enamel.
Enamel.
Enamel.
Dentin is a hard tissue that lies beneath the enamel in a tooth, providing support and protection to the inner structures. It is not as hard as enamel but harder than pulp, the innermost part of the tooth.
Tooth enamel is the outermost layer of the tooth that is made of a hard mineralized substance.
The main substance of a tooth is dentin, which is a hard tissue that makes up the majority of the tooth structure. It is covered by enamel on the outer layer and connected to the pulp at the center of the tooth.
Basically it is the outer layer of a tooth that can get broken down by grinding your teeth and chewing hard candies.
Enamel is a good substance for this job because it is very hard and protects the tooth. It is also white and therefore looks like the tooth as well.
It's Dentin
these are two different elements, thigh bone is "bone" and a tooth is enamel
It is one of the 4 components of the mammalian tooth and is to be found just beneath the hard enamel outer layer or in ridges between ridges of hard enamel. Being softer than the enamel, in herbivores (like the elephant) the dentine wears away faster ensuring that the roughness of the tooth surface is maintained as the tooth itself wears away. In omnivores and carnivores, it mechanically supports the enamel surface and protects the tooth pulp and nerves.