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.

Kite, hexagon, shield, lozenge, bullet, trilliant. Angular outlines we pushed into the mainstream in 2014, when the trade still cut almost everything round. A straight edge behaves differently than a curve- it sits flush against another stone, holds a line in a cluster, and gives a designer geometry to build on rather than work around.