You spot a big gold ring, wide, really there on the finger, at a price that seems gentle for what it looks like. You think "bargain". Nine times out of ten it isn't a bargain: it's a hollow or electroformed ring, a shell of gold around emptiness, weighing three to five times less than a solid ring of the same look. Same 18-carat gold, same shine, but almost nothing inside — and the day you want to resell it or pass it on, the scales will tell you. Here's how to read a ring (beyond the wedding band and solitaire), and what it's really worth per gram.
Volume tells you nothing about the gold
A ring is the piece of jewellery where the illusion of volume works best. On a chain, you feel the weight in your hand; on a wide ring, the eye sees "lots of gold" and the brain concludes "this is expensive". Except a wide band can be full… or hollowed out underneath, tubular, mounted on a thin film of gold that only holds by its shape.
The result is spectacular: two rings identical to the eye, same width, same shine, can contain totally different amounts of gold. The "big cheap volume" isn't a discount from the seller, it's simply less metal. And because a ring is worn every day, the hollow has a second flaw people forget: it wears badly.
Solid, hollow, electroformed: the only thing that matters
Three words decide the value of a ring, far more than its shape or its pattern.
The solid ring is full gold all round the band. It's the one that weighs, that lasts for decades, and that resells per gram. The hollow ring (hollowed out, tubular) is the same look for three to five times less gold: it goes oval under the pressure of the finger, dents, and ends up wearing through where it rubs — and a hollow ring that's worn through is hard to repair, because there's almost nothing left to solder back. The electroformed one is the extreme of hollow: an ultra-thin gold shell deposited on a form, for bulky rings, very light and very cheap, with barely any gold inside.
None of the three is a scam in itself. A light hollow ring is even a smart choice if you want volume without the weight or the price, as long as you own it and pay for what it is. What is a scam is paying for a hollow ring at the price of a solid one while thinking you're setting gold aside — and finding out, at resale, that it weighs nothing.
Where a ring wears (and why hollow is a problem)
A ring isn't an earring: it takes knocks all day long, against keys, the keyboard, door handles. On a solid ring, that means fine scratches that polish out in ten minutes at a jeweller, with no notable loss of metal. On a hollow ring, it's another story: the wall is so thin that at the point of friction (the underside of the band, above all) it thins, deforms, then gives way. Plenty of "cheap" wide rings are in fact solid on the visible top and hollow under the finger — exactly where it wears the most.
That's why, on a ring you actually want to wear, solid isn't just a question of value: it's a question of lifespan.
The per-gram maths, before you fall for it
The only thing to understand is the price per gram. You already do this at the supermarket for ham; do it for gold, it's exactly the same.
A piece in 18-carat gold is 75% gold throughout its mass. Its metal value is: weight × fineness × today's rate. Late June 2026, that puts 18k metal around €90/g, and the real buyback of a solid 18k ring around €74 to €77/g (re-check the day you read this — gold moves every day, and each buyer applies its own discount).
Concretely: a wide solid 18k gold ring weighing 8 g is about €720 of metal, and it resells around €600 at the counter. The same ring hollow, same width and same volume on the finger, will maybe weigh 2 g — that's three to four times less value at resale, for an identical look. When a seller shows you two "matching" rings at very different prices, it's almost never a bargain: it's just two different amounts of gold.
A hollow ring shines like a solid one. The difference doesn't show to the eye — it shows on the scales, and after two years of wear.
The weight benchmark, by type of ring
No need to be an expert: just ask the weight and relate it to the visible volume. As a rough guide, in solid 18-carat gold: a fine, discreet ring (plain band, thin bangle-style ring) generally weighs 1.5 to 3 g; an everyday ring with a bit of presence, 3 to 6 g; a real wide ring, signet or thick solid band, easily climbs to 8 to 15 g and up — and costs a lot, logically.
That's where the trap snaps shut: big showy rings at a low price often weigh 2 to 4 g for a volume that should make it 10 or 12. It isn't magic, it's hollow. Weight doesn't lie. Before any purchase, the first question — before even the price — is: "how much does it weigh?" A serious seller tells you to the tenth of a gram, scales to hand. And be wary of the home test: a wide ring surprisingly light in the hand is almost always tubular.
Check the hallmark before you buy
The second reflex is the hallmark. In France, 18-carat gold carries the eagle's head; abroad, it's the number 750 (for 750/1000, i.e. 75% gold). On a ring, the hallmark is tiny and placed on the inside of the band — ask where it is, and look at it closely, with a loupe if needed. No visible hallmark, or a vague "14k" or even "9k" engraving: that's not investment gold, it's cheap gold that crashes hard at resale.
Three questions to ask the seller, out loud, no embarrassment: what's the exact weight? what's the fineness (18 carat / 750)? is it solid or hollow? An official shop with a physical address answers all three without flinching. If they dance around it, you have your answer. For a few euros, a serious counter will verify the fineness — do it before, not after.
Second-hand or new: what actually changes
For a ring meant to be worn often, second-hand is often the best choice — as long as you aim for solid. A certified second-hand solid ring, simply cleaned, polished and resized to fit by an official shop, is real gold per gram without the big new-retail markup — that markup was already paid by the first buyer. And gold doesn't age: it polishes, melts down, looks brand new again. A ring that's twenty years old is worth exactly its weight in gold, not one euro less. A handy practical bonus: resizing is easy and cheap on a solid ring, whereas it's risky, even impossible, on a hollow or electroformed ring (the wall is too thin to be cut and soldered back cleanly).
What I do warn against, on this kind of piece, is uncertified private-to-private — Vinted, classifieds. Not out of snobbery: simply because on rings, well-faked hollow and false fineness are common, and the volume makes the trickery easy to hide. For a real gold ring, you go through an official shop that puts its responsibility on the line. That's exactly why I only list that kind of shop.
What I'd do myself
If I wanted a ring today — beyond a wedding band, just for pleasure or to pass on — I'd first choose the shape for the style, then I'd ask the three real questions: weight, fineness, solid or hollow — in that order. For gold that counts, I'd aim for a solid 18-carat gold ring, bought certified second-hand, with its hallmark verified on the inside of the band. Even if it means going for a finer ring: a discreet ring that weighs beats a big ring that rings hollow and wears through in two years.
If I just wanted volume for a look, I'd own a hollow or plated ring — but knowing it, and paying for what it is: an accessory, not savings. What you don't do is pay for emptiness at the price of the full thing.
Eleven second-hand 18-carat gold shops, normalised per gram.
To finish
The ring is the gold piece where volume deceives the most: you think you're buying gold because you see "big", when the real question is on the scales and under the finger. A fine solid ring that weighs beats a wide one that rings hollow. Choose your shape for pleasure, but ask the weight, read the hallmark, reason per gram. I'm telling you what I'd do; it's up to you to make your own choices with your own situation and budget.
Sources for the figures cited:
- 18-carat gold price per gram (France, late June 2026): leguidedubijou.fr and lingor.fr, accessed 27/06/2026
- Buyback discount (20-30% on the world rate): leguidedubijou.fr — rachat d'or 2026, accessed 27/06/2026
- Solid / hollow / electroformed rings (difference in weight and wear resistance at equal volume): internal OrOGramme reference ("the gold bangle", "18k gold hoops and earrings" and "18k gold chain and necklace" articles)
- Eagle's-head hallmark (18-carat gold France) / 750 fineness: internal OrOGramme reference ("eagle's head hallmark" article)