High yield diamond

A high yield diamond comprising:

• a generally planar table lying in a table plane;
• a girdle lying in a girdle plane, the table plane being substantially parallel to the girdle plane;
• a plurality of main crown brillianteering facets lying between the table and the girdle at an angle between 23° and 40°;
• a pavilion lying between the girdle and a culet, the pavilion including:
• a plurality of upper pavilion brillianteering facets lying between the girdle and a first pavilion rib line;
• a plurality of lower pavilion brillianteering facets lying between the rib line and the culet;
• the upper pavilion brillianteering facets lying at an angle of between 45° and 80° relative to the girdle plane;
• the lower pavilion brillianteering facets lying at an angle of between 35° and 45° relative to the girdle plane;
• and
• the rib line lying at a point between one-fifth and four-fifths of the distance between the girdle and the culet.