Champagne's deeper register- burnt amber, russet, and the brown-red of a bottle held against a lamp. Natural body color formed in the crystal, untreated and unaltered. Saturation this deep changes what the cut has to do: facets that would read as brilliance in a colorless stone read as movement here.

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.