Figure 1 shows a 4:3 oval (e.g. 8x6mm) cut using the same indexes (azimuths) as a standard round brilliant and also the same slopes for the main facets (the half-facet slopes must be modified for desired depth and proper meets).

The pavilion, at the upper end, shows a trace of end-facet 'a'. At the lower end we have modified the adjoining halves 'ab' and 'bc' to eliminate this useless facet (red lines & data).

The result, as you can see, is not as pretty as we would like. The table does not have the same ratio – it is elongated – and the end facets are squeezed together.


Fig.1 Same indexes & main slopes as round.