Diamond Inclusions

 
 
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Common Inclusions Found in Diamonds

A common flaw found in many diamonds are crystals of other minerals being embedded within the diamond. Such crystals are know as "inclusions". Here are some types of inclusion that you may encounter:
  • Cloud-like inclusions are often found in diamonds from India.

  • Chrome diopside and Chrome enstatite appear as emerald-green well-formed crystals within diamonds. Chrome enstatite inclusions are often found in diamonds from South Africa.

  • Chrome spinel - Chrome spinel appears as a reddish-brown or black octahedral (sometimes distorted) inclusions in diamonds. Chrome spinel inclusions are most commonly found in diamonds from Russia.

  • Diamonds - Sometimes a diamond may contain another diamond crystal embedded within!

  • Garnet - Garnet inclusions may be present as single crystals or as clusters, may in some cases reach large sizes, and most frequently found in diamonds from South Africa. Garnet inclusions can be many different colors: brown, lilac, orange, pink, purple, violet-red, or yellow.

  • Graphite - Like diamond, graphite is a form (allotrope) of Carbon. Graphite inclusons in diamond are black.

  • Olivine - Olivine inclusions are pale green or colorless and often look like bubbles. They may be present individually or in clusters, and are often found on octahedral faces aligned parallel to the edges.

  • Ilmenite, Pentlandite, Pyrite, Pyrrhotite, and Rutile, are all dark-colored minerals that may be found in diamonds. These inclusions are most frequently found in diamonds from Ghana. Because of there somewhat similar appearance, these types of inclusions are sometimes mistaken for graphite inclusions.

  • Ruby - Ruby inclusions can sometimes be found in diamond eclogite sources (eclogite is a metamorphic rock that consists of pyroxene omphacite and pyrope-rich garnet).



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