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A clear octahedral stane protrudes frae a black rock.
The slichtly misshapen octahedral shape o this rough diamond crystal in matrix is typical o the mineral. Its lustrous faces an aa indicate that this crystal is frae a primary deposit.
CategoryNative Meenerals
(repeatin unit)
Strunz clessification01.CB.10a
Creestal seestemIsometric-Hexoctahedral (Cubic)
Formula mass12.01 g/mol
ColourTypically yellae, broun or gray tae colourless. Less eften blue, green, black, translucent white, pink, violet, orange, purpie an reid.
Creestal habitOctahedral
Cleavage111 (perfect in fower directions)
FracturConchoidal (shell-lik)
Mohs scale haurdness10
DiaphaneityTransparent tae subtransparent tae translucent
Speceefic gravity3.52±0.01
Density3.5–3.53 g/cm3
Polish skinkleAdamantine
Optical propertiesIsotropic
Refractive index2.418 (at 500 nm)
Meltin pyntPressur dependent

In mineralogy, diamond (frae the auncient Greek αδάμας – adámas "unbreakable") is a metastable allotrope o carbon, whaur the carbon atoms are arranged in a variation o the face-centered cubic crystal structur cried a diamond lattice. Diamond is less stable than graphite, but the conversion rate frae diamond tae graphite is negligible at staundart condeetions. Diamond is renowned as a material wi superlative pheesical qualities, maist o which originate frae the strang covalent bonding atween its atoms. In parteecular, diamond haes the heichest hardness an thermal conductivity o ony bulk material. Those properties determine the major industrial application o diamond in cuttin an polishin tuils an the scienteefic applications in diamond knives an diamond anvil cells.

References[eedit | eedit soorce]

  1. "Diamond". Mindat. Retrieved 7 Julie 2009.
  2. "Diamond". WebMineral. Retrieved 7 Julie 2009.