Properties

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Properties

    • Hardness and Crystal Structure 
      • Diamond is the hardest known naturally occurring material à scoring 10 on the old Mohs scale of mineral hardness
      • Directional hardness
      • The diagonal on the cube face is the hardest direction à it is 100 times harder than the softest direction (the dodecahedral plane)
      • When “hardness” is brought up, it is typically in reference a diamonds resistance to scratching
    • Toughness
      • A diamonds ability to resist breakage 
      • Due to its perfect and easy cleavage, it is vulnerable to breakage 
    • Optical 
      • High Luster
      • Refractive index: 2.417 
      • High dispersion: 0.044 (B-G interval) manifests in the perceptible fire of cut diamonds 
    • Thermal 
      • Diamond is a good conductor of heat because of the strong covalent bonding within the crystal
      • Because diamond has such high thermal conductance it is already used in semiconductor manufacture to prevent silicon and other semiconducting materials from overheating
    • Electrical 
      • Diamond is a good electrical insulator 
        • Exception: most natural blue diamonds because they are semiconductors due to boron impurities replacing carbon atoms.