You see two pairs of big gold hoops, same diameter, same shine. One costs €120, the other €600. The normal reflex: grab the €120 pair, "they're the same." Except they're not the same at all. On the scales, one weighs ten times less than the other. The hoop is the gold piece where the "big volume, cheap price" trap works best — because a hoop, by construction, is mostly air. Here's how to read what's really inside, and what it's worth per gram.
A hoop is shiny air
A hoop is an open ring you wear on your ear: by nature, it's hollow or very thin. A big hoop that "makes a statement" needs volume to do its job, but that volume is expensive in solid gold — so the market replaces it with empty space. That's exactly the dream terrain for electroforming: a technique that deposits an ultra-thin layer of gold onto a mould that's then dissolved, producing huge rings as light as a feather, sold for a fraction of the price.
The result: on the hoop shelf, the gap between the look and the metal is bigger than on any other piece. A hollow chain still weighs something; a big electroformed hoop is almost no gold at all. And nobody tells you at the point of sale — you see "18-carat gold", big diameter, small price, and you think you're getting a deal.
Solid, hollow, electroformed: the only thing that matters
Three words decide the value of your hoops, far more than their size.
The solid hoop is full gold all the way through the tube. It's the one that weighs, lasts, and resells per gram. The hollow (tubular) hoop is a tube of gold around empty space: same look, three to five times less metal, and it dents or bends at the first serious knock. The electroformed one is the extreme of hollow: a shell of gold so thin it only holds its shape by its form — huge hoops, very light, very cheap, and with almost no gold inside.
None of the three is a scam in itself. A light hollow hoop is even a smart everyday choice: it weighs less on the ear, it's easy to wear daily, and it's perfectly fine as long as you own it and pay for what it is. What is a scam is paying for an electroformed hoop at the price of the real thing while thinking you're setting gold aside.
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 piece around €74 to €77/g (re-check the day you read this — gold moves every day, and every buyer applies its own discount).
Concretely: a pair of solid hoops weighing 8 g of 18k gold is about €720 of metal, and it resells for around €600 at the counter. An electroformed pair of the same diameter will maybe weigh 1.5 g — that's five to six times less value at resale, for an identical silhouette on the ear. When a seller shows you two "matching" hoops at very different prices, it's almost never a good deal: it's just two different quantities of gold.
A big electroformed hoop shines like a solid one. The difference doesn't show to the eye — it shows on the scales and on the buyback receipt.
The weight benchmark, by diameter
No need to be an expert: just ask for the weight of the pair and relate it to the size. As a rough guide, in solid 18-carat gold: a small hoop (15-25 mm) usually weighs 2 to 5 g the pair; a medium hoop (30-45 mm), more like 5 to 12 g; a genuinely solid big hoop (50 mm and up) climbs fast to 15 g and more — and costs a lot, logically.
That's where the trap snaps shut: the very big hoops "light as nothing" that you see at a small price often weigh 1 to 3 g the pair for a diameter of 50-60 mm. That's not magic, it's electroformed. Weight doesn't lie. Before any purchase, the first question — even before the price — is: "how much does the pair weigh?" A serious seller tells you to the tenth of a gram, scales to back it up. And beware the clasp: on some hoops, the closing system (post, hinge) is the only part that's a bit solid, the rest being hollow.
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 hoop, the hallmark is tiny and often placed near the clasp or on the inside of the ring — ask where it is, and look at it. 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 of the pair? what's the fineness (18 carat / 750)? is it solid or hollow/electroformed? 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 hoops meant to be worn often, second-hand is usually the best choice — provided you aim for solid. A certified second-hand solid pair, simply cleaned and polished 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 hoop that's ten years old is worth exactly its weight in gold, not a euro less.
What I do warn against, on this kind of piece, is private-to-private, uncertified — Vinted, classifieds. Not out of snobbery: simply because on hoops, well-faked hollowness and false fineness are particularly common (the format lends itself too well to fakery), and you won't even dare get it certified for fear of finding out you were had. For a real pair of gold, 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 hoops today, I wouldn't look at the diameter or the sticker price first. I'd ask for the weight of the pair, the fineness and solid or electroformed — in that order. For gold that counts, I'd aim for a solid hoop in 18-carat gold minimum, bought certified second-hand, with its hallmark verified. Even if it means a more modest diameter: a small solid hoop beats a big empty hoop.
If I just wanted big light hoops for the summer, I'd own the electroformed or the plated — but knowingly, and paying for it as what it is: an accessory, not savings. What you don't do is pay for empty space at the price of full.
Eleven second-hand 18-carat gold shops, normalised per gram.
To finish
The hoop is the gold piece where the gap between the look and the metal is the most brutal: you buy a big diameter thinking you're buying gold, and you leave with a cloud. A small solid hoop that weighs beats a huge hoop that rings hollow. Ask for the scales, 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 26/06/2026
- Buyback discount (20-30% off the world rate): leguidedubijou.fr — gold buyback 2026, accessed 26/06/2026
- Solid / hollow / electroformed hoops (weight difference at equal diameter): internal OrOGramme reference ("vermeil, gold plated, gold filled, solid gold" and "the gold bangle" articles)
- Eagle's-head hallmark (18-carat gold France) / 750 fineness: internal OrOGramme reference ("eagle's head hallmark" article)