The Four Cs, without the sales pitch

Most of what is written about diamonds is written to sell them. The Four Cs — cut, color, clarity, carat — are a grading language, not a ranking of virtue, and the honest version of that language is shorter than the brochure version. Here is how the bench actually reads a stone, in the order the bench actually cares.

Cut

Cut is the only C a human being made, and it is the one that decides whether a diamond looks alive. A well-cut stone returns light to your eye; a poorly cut one leaks it out the sides and bottom. If the house could persuade you to spend your attention on a single letter of the grading report, it would be this one. A smaller, better-cut stone will outshine a larger, lazier one in every room you ever stand in.

Color

Color grades run from D downward, and the differences at the top of the scale are invisible outside a laboratory. Set in yellow gold, a warmer stone reads as intentional, not inferior. The honest question is not "what grade is it" but "does it look white in the metal you have chosen" — and that is a question answered by eye, in daylight, not by a letter on paper.

Clarity

Clarity describes what a grader finds at ten-times magnification. You will wear the stone at arm’s length. Most inclusions graded VS and many graded SI cannot be found without a loupe and patience, and some can be hidden entirely under a prong by a setter who is paying attention. Pay for eye-clean; the microscope is not invited to the wedding.

Carat

Carat is weight, not width. Two stones of identical weight can face up very differently depending on how they were cut, and prices step sharply at the round numbers — which means the stone just under a threshold is often the intelligent buy. The bench will always show you the spread rather than the number.

“A stone you understand is a stone you never doubt.”

None of this requires trust in us — it requires an hour at a table with good light and a loupe you are allowed to hold. That is what a viewing at the house is for. Bring your questions; the stones will answer most of them.