The 4Cs—cut, colour, clarity and carat weight—are a shared framework for describing diamonds. They are not a single score: a diamond is a combination of characteristics, and visual appeal can differ among stones with similar grades. A grading report describes a specific stone under a laboratory's standards.
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How to choose
Set a budget and decide which visual qualities matter most to you. Compare stones side by side, especially cut appearance and face-up size, then read the full grading report. Confirm whether the diamond is natural or laboratory-grown and ask about treatments. The report's issuing laboratory, report number and matching inscription should be verified.
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The Asia lens
If buying abroad, compare the full delivered price, currency conversion, insurance, return window and local after-sales support. Ask for the grading report and invoice before paying, and verify whether the ring setting can be serviced locally.
The short answers
Frequently asked questions
Which of the 4Cs matters most?
There is no universal order. Many buyers prioritise cut appearance, but personal preferences and setting can change the decision. Compare actual stones.
Does a diamond certificate guarantee value?
A report describes characteristics; it is not an appraisal, resale guarantee or certification of investment value.
Are lab-grown diamonds real diamonds?
They share diamond's essential material properties but are produced differently and are a distinct product category. Ask for clear disclosure and compare prices and policies.
This guide is educational, not an appraisal, authentication certificate, legal or tax advice, or investment recommendation. Product details and local rules change; verify them with the brand, a qualified specialist or the relevant official authority.