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What are feather inclusions?


Few days ago, we had this 1.50 carat emerald cut diamond in the lab for a diamond report. It was established the gem had a feather inclusion, and we thought why not shed some light on this type of diamond inclusions and its properties.



·      Diamond inclusions are impurities that occur inside the gemstone. They are usually called flaws because their presence means the diamond cannot be graded as internally flawless. 


·      In grading reports, feather inclusion is a term that generally refers to cracks, fractures or breaks in a diamond resembling feathers.


·      Feather inclusions are among the most common inclusions to be found in a diamond.


·      Feather inclusions are the most difficult to see with your naked eye.


·      Feather inclusions usually have white appearance and often slim form.


·      In diagrams, feather inclusion is symbolized as ~.


·      Small feathers do not usually affect a diamond's durability.


·      Feathers can grow in size if they are subjected to a hard knock or everyday wear and tear.


·      Severe feathers can cause durability issues, especially if they are surface reaching or near the girdle area.



If you require a diamond report, please call us on 0207 242 0049 or send an email to to make a booking.


We offer mid-size reports that include basic information on colour, clarity and finish as well as full-size reports that go into more detail on polish and symmetry. Both documents carry diagram plots and images. All of the diamonds we receive are fully insured and graded by qualified DGA & GG graders.