What term refers to the length of the star facets expressed as a percentage of the total distance between the girdle and the edge of the table facet?

What term refers to the length of the star facets expressed as a percentage of the total distance between the girdle and the edge of the table facet?

• A. The width of star facets measured in millimeters along the crown
• B. The length of the star facets expressed as a percentage of the total distance between the girdle and the edge of the table facet
• C. The depth of the star facets as a percentage
• D. The number of star facets on the girdle

Answer: (B)

The idea being tested is how the length of the star facets is expressed in proportion to the crown height. The term used for this is star facet length percentage: it describes how far the star facets extend from the girdle toward the table edge, expressed as a percentage of the total distance from the girdle to the edge of the table facet. This proportion helps define crown geometry and influences light performance and symmetry. The other options describe different measurements that aren’t about the length of star facets relative to crown height: width in millimeters along the crown, depth of the star facets as a percentage, or the number of star facets around the girdle.

The idea being tested is how the length of the star facets is expressed in proportion to the crown height. The term used for this is star facet length percentage: it describes how far the star facets extend from the girdle toward the table edge, expressed as a percentage of the total distance from the girdle to the edge of the table facet. This proportion helps define crown geometry and influences light performance and symmetry.

The other options describe different measurements that aren’t about the length of star facets relative to crown height: width in millimeters along the crown, depth of the star facets as a percentage, or the number of star facets around the girdle.