What is a cross facet on a gemstone?
By Jared James · Last updated 21 May 2026
Definition
Cross facets are small triangular surfaces cut just above and below the girdle of a brilliant-cut gemstone, connecting the main facet groups to the girdle edge. In a round brilliant diamond they sit on the crown between the bezel facets and the girdle, and on the pavilion just above the lower girdle facets. They are part of the precision geometry that directs light efficiently through the stone, and while small they contribute to the overall balance of how a cut diamond returns light.
Frequently asked questions
- Where exactly are cross facets on a diamond?
- On a standard round brilliant, cross facets are the small triangular facets on the crown that sit between the kite-shaped bezel facets and the girdle, and the matching triangular facets on the pavilion just above the girdle. They fill in the geometry between the larger facet groups.
- Do cross facets affect how a diamond sparkles?
- They contribute to the overall pattern of light return along with all the other facets. In a well-cut stone every facet angle is optimised together, so cross facets play their small part in the full picture. Poorly cut cross facets can create dead zones at the girdle edge.
- Are cross facets unique to round brilliant diamonds?
- The term is most associated with the round brilliant, but similar triangular connecting facets appear in other brilliant-style cuts. Step cuts like emerald and Asscher cuts have a different geometry and do not use the same cross facet arrangement.
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