Diamond Inclusions Chart

Diamond Inclusions Chart. Cavity — a split in the structure of the diamond. Watch how the visibility of the inclusions changes in the image on the right.

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The diamond clarity rating or grade is an important factor to consider regardless of the size and shape of the diamond. Inclusions happen because diamonds are subjected to lots of pressure and high temperatures deep into the mantle of the earth. A diamond plot is used to record the location and size of these inclusions.