By Duncan Miller

Jewellers sometimes ask for the impossible, and it’s a challenge to try and oblige. This design was developed to cut the citrine for a dome-shaped ring. It had to be a ‘classical’ mixed cut with curved girdle lines to match the curve of the top of the ring. This design requires a preform to get the girdle facets the right size. The relative depth of the pavilion tiers affects the angles of the triangular corner facets, but these can be tweaked to reach the meets.


These are two fluorites facetted by Duncan Miller from a single piece of Riemvasmaak rough bought recently at Open Day from Rockey Ollewagen. The stones are 32,5 ct and 66,0 ct, and full of small inclusions, which makes them sleepy.