Crown Angle is the angle formed by which features?

Crown Angle is the angle formed by which features?

• A. The angle between the table and girdle.
• B. The angle formed by the bezel facets and the girdle plane.
• C. The angle formed by crown facets and pavilion facets.
• D. The angle formed by star facets and the girdle.

Answer: (B)

The crown angle describes how steep the crown’s upper facets are relative to the girdle. It is specifically the angle formed by the bezel facets and the girdle plane—the boundary where the crown meets the girdle. This angle, along with table size and crown height, helps determine how light is returned to the viewer, affecting brilliance and fire. The other options describe different relationships (table to girdle; crown to pavilion; star facets to girdle) and are not the defined crown angle.

The crown angle describes how steep the crown’s upper facets are relative to the girdle. It is specifically the angle formed by the bezel facets and the girdle plane—the boundary where the crown meets the girdle. This angle, along with table size and crown height, helps determine how light is returned to the viewer, affecting brilliance and fire. The other options describe different relationships (table to girdle; crown to pavilion; star facets to girdle) and are not the defined crown angle.