What to Look For
A good cut showcases the gemstone's colour, diminishes its inclusions, and exhibits good overall symmetry and proportion. Because gemstone colour can vary, there are no hard geometrical standards when it comes to maximizing brilliance or colour. Gemstones, especially rarer ones, are sometimes cut for size without regard for their colour. For example, when corundum varieties such as sapphire and ruby are cut for maximum weight rather than beauty, they may display banded colours or streaks. Blue Nile sells only the finest quality, hand-selected coloured gemstones.