A pit is a small opening in the surface that looks like a tiny white dot.
In more detail
It is a blemish. The polish grader looks for pits at 10x, with nicks, polish lines and scratches.
On a grading report
A blemish; it can count in the polish grade.
Related terms
- Nick: A nick is a small notch on a facet junction, with no clear depth at 10x. It is usually on the girdle edge or at the culet.
- Polish: Polish is the grade for the smoothness of the facet surfaces, from Excellent to Poor. The grader looks at 10x for pits, nicks, polish lines, scratches, burn marks and rough patches.
- Blemish: A blemish is a clarity characteristic confined to the surface of a diamond.