Diamonds as an asset class.

We begin with your situation: what amount is to be committed, over what period, and what role the position should play alongside your other assets. That determines whether a single larger natural diamond makes sense or several smaller positions across different colors.

Only then do we search. We present a manageable selection, each piece with its laboratory certificate, proof of origin, and a price we can explain. You see why we propose a stone and why we ruled others out.

The focus on Argyle diamonds has a factual basis. Since the mine closed in November 2020 no new material has come through; what is on the market comes from a finite holding. That origin cannot be repeated, and it has become a value in itself.

After the purchase we remain your point of contact. We keep your position on file, follow the market, and come back to you when a development matters for you.

Enquire about this service

Many holdings have grown over decades, often without a proper valuation ever having been made. We record the holding, review the existing documents, and grade each piece by color, intensity, weight, clarity, and cut.

Where a certificate is missing or outdated, we arrange a fresh appraisal by GIA, HRD, or IGI on request. Where proof of origin is absent, we say plainly what can still be documented and what cannot, because that gap affects the price achievable.

You receive a written assessment giving a range rather than false precision. It serves for the division of an estate, for insurance, and as the basis for a decision to sell.

The valuation is independent of any instruction to buy or sell. It commits you to nothing.

Enquire about this service

The truly rare fancy color diamonds often never reach the open trade. They change hands quietly within established networks, frequently before they are offered at all. Anyone who sees only what is publicly listed sees the regular part of the market.

Our access has grown over decades and rests on personal relationships with manufacturers, dealers, and collectors in the principal trading centres. For you this means a targeted search: you tell us what you have in mind, the order of magnitude, and the time frame; we consult our network and come back to you as soon as something suitable becomes available.

Such a search takes patience. The narrower the brief, the longer it can take, and we will tell you when a wish cannot currently be met on the market rather than passing off a compromise as a find.

Enquire about this service

A natural diamond does not have to stay in the vault. If you wish, we have it set as a ring, pendant, or earrings, made by the manufacturer we have worked with for years.

The design is developed with you. We discuss the material, the type of setting, and the proportions, taking care that the setting suits your diamond and shows it to its best advantage. With fancy color diamonds the choice of material can visibly influence the effect.

One point matters for the investment: the setting remains removable, as with any other piece of jewelry, and the certificate stays assigned to the diamond. A later sale of the diamond therefore remains possible at any time, without loss of value through the work.

Enquire about this service

There are two routes to a sale, and they lead to different outcomes. The wholesale market is quick and dependable but pays the dealer price. The private market achieves more but requires time and the right buyer.

Before you decide, we tell you which route suits your piece and why: it comes down to color and size, to the completeness of the documents, and to how many comparable positions are currently on the market.

We handle the process in full, from insured transport through appraisal to payment. You know in advance what costs arise and what amount remains with you.

We deliberately give no buyback guarantee. A promise that depends on a future market would not be one.

Enquire about this service

Where a natural diamond is kept is a question of security, access, and taxation at once. We set out the established routes: the bank safe deposit box, the bonded warehouse, and custody at home in your own safe.

For larger positions the bonded warehouse is often the most sensible solution, because the goods remain under customs seal and import duties fall due only on withdrawal. Access is regulated but not spontaneous; anyone who wants to see their piece at any time is better served by another arrangement. How storage works in detail is set out on the page Diamonds in a bonded warehouse.

We base the insurance on the actual value rather than a flat figure. The basis is the current valuation, which we refresh at intervals where needed so that cover does not fall behind the market.

Enquire about this service

Every movement of a natural diamond is a risk, and every one can be covered. We deliver in person or instruct a security service; in both cases the consignment is insured for its full value and documented without gaps.

For an appraisal the natural diamond goes to GIA, HRD, or IGI. We handle the submission, the insured dispatch, and the return, and keep you informed of the status. Depending on the institute and its workload, such a round takes several weeks.

We also carry this out for pieces you did not acquire from us. It is frequently the first step when an inherited holding is to be put in order.

Enquire about this service