Are coloured gemstones a good investment?

Only within a narrow band of material, and only over a long horizon. Untreated stones of fine colour, in genuinely scarce sizes, with reports from laboratories the market respects, have held and grown their value. Treated commercial goods, small sizes and unpapered stones have not. A stone pays no yield, cannot be sold quickly, and carries a very wide spread between retail and realisable price, so it suits capital that can be left alone for a decade rather than money that must be available.

How liquid are gemstones compared to gold?

Considerably less. Gold is fungible and has a continuous quoted price. Every gemstone is unique, so there is no exchange, no daily bid and no index. Selling a significant stone means an auction cycle or a private placement, and both are measured in months rather than days.

What is the biggest cost when buying a gemstone as an asset?

The spread — the distance between retail price and what you could actually realise on a resale. It dwarfs insurance, storage and certification costs combined. Buying close to wholesale is the only part of the equation a buyer genuinely controls.

Are Coloured Gemstones an Investment?

Asked directly, and answered without the sales pitch: what a stone does, and does not do, as an asset.

I sell stones, so weigh what follows accordingly. It is also the answer I give clients before they buy, because the alternative is a disappointed owner in ten years’ time.

What a stone does not do

It pays nothing. No coupon, no dividend, no rent. The entire return is whatever someone pays you later, which means the holding period is doing all of the work.

It does not trade. There is no exchange, no daily price, no bid you can hit. Selling a significant stone means an auction cycle or a private placement, and both are measured in months. Anyone describing a gemstone as liquid is describing something else.

And it carries a spread that dwarfs anything in financial markets. The distance between what a stone retails for and what you can realise on it is the single largest obstacle to making money on one. Buy at full retail and the stone has to appreciate substantially just to return your capital.

What has actually held value

A narrow band. Untreated material, fine colour, papers from houses the market respects, sizes that are genuinely scarce, and origins with an established record. Inside that band the long-run record is good and in some categories it has been very good. The word unheated is doing a great deal of the work in that sentence.

Outside it, very little has happened. Treated commercial goods, small sizes, unpapered stones and fashionable varieties without a collector base have not performed, and there is no particular reason to expect them to. The category’s reputation as an investment rests on the top of the market and is sold to people buying the bottom of it.

The costs nobody quotes

Insurance, secure storage, and certification — including recertification when reports age or a stone is recut. Selling at auction costs a seller’s commission; buying at auction adds a buyer’s premium on top of the hammer. None of it is large in a single year. All of it compounds against an asset that yields nothing.

Where it does make sense

A stone is a store of value for someone who already holds capital, wants a portion of it outside the financial system in a form that is portable, private and durable, and can leave it alone for a decade or more. On those terms it does its job well, and has done for a very long time.

It is not an income strategy, it is not a trade, and it is not a substitute for a diversified portfolio. If a stone has to be sold on a schedule, it is the wrong asset.

The one lever a buyer actually controls is the entry price. Everything above — the spread, the absent yield, the slow exit — is fixed by the nature of the thing. What you pay at the start is not. That is the whole of my argument for buying close to the source, and I would rather make it plainly than dress it up as a forecast.

Buy a stone because you want to own it, at a price that would not embarrass you if you never sold it. Anything it does afterwards is a bonus, not a plan.