Diamond is less stable than graphite, but the conversion rate from diamond to graphite is negligible at ambient conditions.. 
Harris Jr., NASA ènìyànrọ́nàut, first African American to walk in space Robert Henry Lawrence Jr., USAF lórímesai, first African-American ènìyànrọ́nàutJoan Higginngham, NASA Dokurọ́nàut, EnginMae JeLóòótọ́Lóòótọ́, NASA Dokumeut, Engin, physician, first African-American woman in spaCelelati d.. 