Carbon
While both graphite and diamonds contain drastically different properties, carbon makes up the entire chemical makeup of both. However, the way the carbon atoms come together determines the structure.
Diamonds
In a diamond, the carbon atoms shape a tetrahedral structure, according to Scientific American magazine. This structure gives the diamond a high density, hardness and strength. Other properties of diamonds include heat and sound conductivity, as well as electrical resistance.
Graphite
Graphite, on the other hand, results when the carbon atoms form in layers, creating a hexagonal chemical arrangement, writes Eastern New Mexico University. This chicken wire-like structure gives graphite a soft property that cleaves easily and it also absorbs light.