Explanation

Diamond is an allotropic form of carbon.

Carbon is capable of forming many allotropes, which are structurally different forms of the same element, due to its valency.

Some of the well-known forms of carbon include:

• Diamond
• Graphite
• Graphene
• Lonsdaleite (hexagonal diamond)
• Graphenylene
• Carbophene
• AA'-graphite
• Diamane
• Amorphous carbon
• Nanocarbons
• Glassy carbon
• Carbon nanofoam
• Carbide-derived carbon
• Linear acetylenic carbon
• Cyclocarbons