Carat measures weight, not visual size. Two gemstones with the same weight can face up very differently because of density, proportions, and cutting decisions.
Weight versus dimensions
Dense materials carry more weight in the same physical volume. Deep cutting can retain carat weight while hiding mass below the setting line.
Always compare millimeter dimensions alongside carat weight, especially when buying for a specific jewelry design.
What good cutting accomplishes
Cutting controls brightness, contrast, pattern, color concentration, shape, and symmetry. Colored-stone cutters often prioritize color and yield rather than a single standardized proportion.
Windowing allows the viewer to see through the center. Extinction creates areas that remain overly dark. Both can be intentional or distracting depending on the stone.
Rough, recut, and collector choices
A recut may improve brilliance and symmetry but reduce weight. For rare specimens, original crystal form, locality, and surface condition can matter more than faceting potential.
Ask for side-view photographs and exact depth measurements when proportion or setting suitability matters.
Key takeaways
- ◆ Carat is weight—not size.
- ◆ Dimensions reveal face-up presence.
- ◆ Cut should support the stone’s color and character.
- ◆ Recutting involves a beauty-versus-weight tradeoff.