Six Questions to Ask Before You Buy a Diamond

The questions that separate a confident diamond purchase from an expensive guess, and what a good jeweller's answers should sound like.

You do not need to become a gemmologist. You need six questions and the willingness to ask them.

How they are answered will tell you more than the answers themselves.

1. May I see the report, and does the number on the stone match it?

A grading report describes one specific diamond. Matching the inscription to the paper takes a minute and confirms you are buying the stone that was graded.

While you are there, look the report number up on the laboratory's own website. It is free, it takes under a minute, and it confirms the document has not been altered.

2. What is the cut quality?

For a round brilliant there will be a cut grade. For a fancy shape there will not, but there will be polish and symmetry grades, and the jeweller should be able to discuss the stone's proportions without deflecting.

3. Where is the inclusion, and can I see it?

Not "what is the clarity grade", where is it. A jeweller who shows you the inclusion under magnification is comfortable with what they are selling.

The follow-up matters as much: would I ever find it without a loupe? Most of the time the honest answer is no, and that answer should change what you are willing to pay to move up a grade.

4. Is this natural or laboratory-grown?

The answer should be immediate and unprompted, and it should be documented. Either is a legitimate purchase. Ambiguity is not.

5. What am I paying for besides the stone?

Setting, metal, workmanship. These should be separable figures. If they cannot be separated, you cannot compare anything.

6. What happens if something goes wrong?

Loose prong at six months. Resizing. A stone that needs re-setting. Ask what is covered, for how long, and what it costs. Ask before, not after.

A seventh, if you are ordering rather than buying off the shelf

When will I see it before it is finished, and what can still change at that point?

A bespoke or made-to-order piece passes through stages where adjustment is cheap and stages where it is not. Knowing when the drawing is approved, when the design is fixed, and when the metal is committed tells you exactly how long you have to change your mind.

Ask for those moments up front. It converts a long wait into a sequence you can follow.

Take one photograph of the answers

Write the six answers down, or photograph the sheet where they are written.

Not because anyone is likely to mislead you, but because you will visit more than one jeweller, and by the third the details blur. Written answers are comparable. Remembered impressions are not.

What good answers sound like

Specific. Unhurried. Comfortable with being checked. A jeweller who welcomes the questions is telling you something about how they run their business.

Vagueness under polite questioning is the only real warning sign, and it is a reliable one.

Book a complimentary design consultation at our Kuala Lumpur atelier: 010-766 7448 · hq@cgarden.com.my

C'Garden is an independent bespoke jeweller in Kuala Lumpur. We are not affiliated with, endorsed by, sponsored by or certified by any organisation, laboratory or brand named in this article. Third-party names are used only to refer factually to those organisations and their published standards. All text and imagery in this article is original work created by C'Garden.

Reference

Gemological Institute of America. (n.d.). GIA diamond grading & reports. GIA 4Cs. https://4cs.gia.edu/en-us/grading-diamond-4cs/