Which term describes the length of the star facets expressed as a percentage of the distance from the girdle to the edge of the table facet?

• A. Table Gauge
• B. Girdle Thickness
• C. Star Length Percentage
• D. Crown Angle

Answer: (C)

Star Length Percentage describes how long the star facets are relative to the crown height, which is the distance from the girdle up to the edge of the table facet. In round brilliant cuts, the star facets sit around the table, and expressing their length as a percentage of that crown height helps define the crown’s proportion and symmetry. This measure directly influences how light is reflected from the crown and contributes to the overall visual balance of the diamond.

Table gauge refers to the thickness or relative size of the table facet, girdle thickness is the width of the girdle itself, and crown angle is the angular tilt of the crown facets. These relate to other dimensions of the cut, not the star facet length expressed as a percentage of crown height.