Diamond Education

Yellow gold elongated cushion diamond solitaire, photographed on a cream cushion

What Are Polish and Symmetry Grades on a Diamond?

Polish describes how smooth a diamond's facet surfaces are. Symmetry describes how evenly those facets are shaped and aligned. We explain the GIA grades and how they relate to the...

What Are Polish and Symmetry Grades on a Diamond?

Polish describes how smooth a diamond's facet surfaces are. Symmetry describes how evenly those facets are shaped and aligned. We explain the GIA grades and how they relate to the...

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