Question

why is Diamond rare in nature than graphite​

Answer 1

The tetrahedral bonds in diamond are much stronger and more stable than the planar bonds in graphite. But it takes more energy to push the carbon atoms into the tetrahedral structure than into the planar structure. ... So diamond is most fundamentally more rare because it takes more energy to form the structure.

Answer 2

The tetrahedral bonds in diamond are much stronger and more stable than the planar bonds in graphite. ... Then, where there's lots of heat and pressure, some graphite is transformed into diamond. So diamond is most fundamentally more rare because it takes more energy to form the structure.