The 4Cs of diamonds
Four measures. One diamond.
A report separates the details. Your decision brings them together. Explore what each measure describes—and what it cannot tell you alone.
01 — Cut
A relationship
with light.
Cut quality concerns how a diamond’s proportions and finish work together. It is different from the outline we call its shape.
These cross-sections explain a principle. They do not predict a cut grade or calculate brilliance; many proportion combinations can work well.
Light paths are simplified illustrations, not ray-traced measurements.
Understand cut & proportionsCut, in context.
For standard round brilliant diamonds, cut assessment considers appearance and craftsmanship together. Fancy shapes do not all share the same cut-grading framework. A label such as “3EX” must be understood in the context of the issuing laboratory.
Colour, in context.
D is the highest grade in the D–Z colour range; it is not a universal scale for all diamond colour. View the report alongside the actual stone, remembering that metal, surroundings and light affect appearance.
Clarity, in context.
A clarity grade is not assigned by counting a few visible dots. A gemologist evaluates characteristics under defined conditions. Grading and whether a feature is noticeable in normal wear are related but different questions.
Carat, in context.
Two diamonds with equal weight can have different measurements. Ask for the length, width and depth, particularly when matching stones or selecting one for an existing setting.
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