The fear no one talks about: am I being overpaid for this stone?

There is a fear that most engagement ring buyers carry but almost never say aloud: what if I am being sold a worse stone than I am being told I am buying?

It is a legitimate fear. The engagement ring market has genuine fraud in it — not universally, not even commonly at the upper end, but enough that the fear is rational. I am going to describe the actual mechanisms of that fraud, explain how to protect yourself, and explain how I operate in relation to each of them.

The grading laboratory problem

Every diamond sold at the €2,000+ level should come with a grading report from an independent laboratory. The question is which laboratory.

Two laboratories matter: the GIA (Gemological Institute of America) and, to a lesser extent, the IGI (International Gemological Institute). Both grade consistently, both are internationally recognised, and both can be trusted as a baseline.

There are also several laboratories — most notably the EGL (European Gemological Laboratory) — that grade significantly more generously than the GIA. A stone graded G VS1 by EGL would typically be graded H SI1 or lower by GIA. The difference in market value between G VS1 and H SI1 is approximately 30 to 40%. Sellers who knowingly use EGL reports to price their diamonds at GIA-equivalent levels are exploiting this gap. This happens regularly.

The rule: insist on GIA or IGI documentation. If a seller cannot provide it — or presents an EGL, IGL, or house-brand certificate — discount their stated quality grade significantly, or walk away.

The “compare at” pricing game

Many online jewellers list a “compare at” or “retail value” price alongside their asking price, implying a significant discount. This comparison price is almost always invented. There is no standard retail price for a diamond; the market is fragmented and opaque enough that any number can be claimed as a comparison without a verifiable basis.

Ignore comparison prices entirely. The relevant question is whether the stone quality, at the grading level documented, is fairly priced against the current wholesale market for that specification.

Treated stones

Some diamonds are treated after cutting to improve their apparent colour or clarity. The most common treatments are fracture filling — a glass-like resin injected into surface-reaching inclusions — and HPHT processing, which removes certain colour from near-colourless stones.

Treated stones are legal to sell, but they are worth significantly less than untreated stones of equivalent apparent quality, and they must be disclosed. A fracture-filled stone, if the filler degrades under heat or cleaning chemicals, will reveal the inclusions that were hidden. The GIA and IGI both disclose treatments on their reports. If a stone’s report does not mention treatment, that is a positive indication — but buying from a seller who commits in writing that stones are untreated is the safest protection.

Stock photography and misrepresentation

Many online retailers use representative photography rather than photographs of the specific stone you are purchasing. This is common practice and legal, but it creates a gap between expectation and reality. The photograph shows a beautifully cut, optically crisp stone. The stone that arrives has a bow-tie, or an off-centre culet, or less-than-ideal polish.

The protection: ask for a specific photograph and video of your actual stone before committing. Any reputable seller should be able to provide this. If they cannot, or will not, this is a significant warning.

I never sell from representative photography. Every stone I propose to a client is photographed and video-reviewed before they commit, and the stone in the photographs is the stone they receive.

How Rauno Oidram operates

I work exclusively with GIA or IGI-graded stones. I do not knowingly buy treated natural diamonds. I provide photographs and video of each specific stone. I do not use comparison pricing. I explain, per the pricing essay, where every euro in the total cost goes.

This is not a complicated ethics position. It is a straightforward commitment to operating in a way I would want a seller to operate with me. Buyers who trust you completely spend more, refer more, and are a pleasure to work with. Obscuring information creates short-term sales and long-term reputational damage.

The three questions to ask any jeweller

Before you commit to a stone from any seller — including me — ask these three questions:

1. What is the grading laboratory, and can I see the full report? Accept GIA or IGI. Be cautious of anything else.

2. Has this stone been treated in any way? The answer should be an unambiguous no, or a specific and disclosed yes. Uncertainty is an answer.

3. Can I see photographs and video of this specific stone, not a representative image? The answer should always be yes. If it is not, reconsider.

A seller who answers all three questions clearly and immediately is a seller worth trusting. The ones who hesitate on any of them are showing you something.

For the broader pricing landscape, see What you’re actually paying for in a €5,000 engagement ring. For guidance on stone shape and quality trade-offs, read How to choose a stone shape that flatters the hand it will live on.