Diamond Mining - How are diamonds mined and formed? Documentary Film In mineralogy, diamond is a metastable allotrope of carbon, where the carbon atoms are organized in a variation of the face-centered cubic crystal structure called a diamond lattice. Ruby is less secure than graphite, yet the conversion rate from ruby to graphite is negligible at typical problems. Diamond is renowned as a material with outstanding physical high qualities, the majority of which stem from the strong covalent bo