Saturated yellow, from nitrogen present when the crystal formed. Where a light yellow stone hints, these commit- the color carries across a room and holds under any light. Cut matters more here than in a colorless diamond, because proportions either concentrate the color or wash it out.

The most engineered cut in the trade, fifty-seven facets arranged to return as much light as the rough allows. Optimized over a century for maximum brilliance, which is why so much of what is sold today looks alike. We select for the ones that do not: proportions cut for the stone rather than for yield.