Write down the different allotropic forms of carbon and their uses.

Allotropic Forms of Carbon & Uses: 1. Diamond: $sp^3$ hybridized 3D lattice (cutting tools, jewelry). 2. Graphite: $sp^2$ planar sheets (pencil leads, solid lubricant, electrodes). 3. Fullerenes ($C_{60}$): Buckminsterfullerene (nanotech, drug delivery).