CCubic
Diamond
C
Native ElementsChemical FormulaC
Crystal SystemCubic
Mohs Hardness10
Specific Gravity3.52
ColorColorless, yellow, brown, blue, pink
LusterAdamantine
StreakWhite
CleavageFour directions
FractureConchoidal
Occurrence
Formed deep in Earth mantle under high pressure. Found in kimberlite pipes. Hardest known natural mineral.