Part of the JewelFreebies™ Material Guide series. One motif, one material question, one free hands-on set. This guide is the infinity symbol — a shape that promises "forever" — and the question is which of the two metals it is usually made from can actually keep that promise.
♾️ "Forever" Jewellery — and the Metal That Lasts a Season
There is a small irony in most infinity jewellery. The symbol means endless, and the bracelet it sits on is very often made of the metal least able to last: die-cast zinc alloy under a plated finish, the same material as the zip pull on your jacket, the buckle on your belt and the hinge on your sunglasses. It looks perfect in the shop. Within months the plating wears through at the crossing point, the colour dulls, and "forever" turns out to mean "until Christmas".
The alternative is the metal of your cutlery, your watch case back and your piercing bars — solid stainless steel, which does not have a finish to wear through because what you see is what it is all the way down. This guide takes the infinity link, the shape most often used as a bracelet connector, makes it in both metals, tells the long and surprising story of where the symbol came from, and answers the questions people actually ask about it.
🎓 Jewellery Is Not Just Decoration. It Is Knowledge.
That is the whole idea behind JewelFreebies™. A guide can tell you that stainless steel is denser than zinc alloy, rings rather than thuds, and shrugs off water. Reading it takes ten minutes. Holding both metals in the same shape takes ten seconds, and you never forget the difference.
So JewelHub posts small free sets, each built around one comparison: the same shape and the same dimensions in two different metals, so the only variable left is the material. The Spiral, Heart and Infinity sets are all live now. Each one is wearable jewellery, and each is a lesson you keep. It costs nothing, and it makes you a much harder person to sell a plated "forever" bracelet to. The wider material library lives on JewelLearn.
The Infinity Material Set
The same infinity pendant in two metals: zinc alloy on a black cord and stainless steel on a chain.
📖 The Long Story of the Infinity Symbol
The infinity symbol looks ancient. It is, in fact, one of the youngest symbols in jewellery — younger than the heart, younger than the cross, younger than the star. But the idea it stands for is as old as the first person who watched a snake coil round and swallow its own tail.
The snake that eats itself
The oldest picture of endlessness is the ouroboros: a serpent bent into a circle, its tail in its mouth. It was painted on a shrine in the tomb of Tutankhamun around 1320 BC, where it wrapped the head and feet of a figure of the sun god to show the whole of time enclosing him. The Greek alchemists of Egypt inherited it and wrote beside it hen to pan — "the one is the all". From them it passed to the medieval alchemists of Europe, then to the Norse, who imagined a world-serpent called Jörmungandr lying round the whole earth with its tail in its jaws, and finally to the Victorian jewellers, who made snake rings and bracelets with the head biting the tail as tokens of eternal love. Queen Victoria's own engagement ring, given by Albert in 1839, was a snake. The circle-that-returns was the symbol of forever long before anybody drew a figure of eight on its side.
The endless knot
In Tibet, India and across the Buddhist world, the same idea took a different shape: the endless knot, one of the Eight Auspicious Symbols, a single line woven over and under itself with no beginning and no end. It stands for the way everything is connected to everything else, for wisdom and compassion inseparable, and for the endless cycle of cause and effect. It is carved on temple doors, printed on prayer flags, and knotted in red cord on the wrists of children. If you have ever seen a Chinese knot ornament hanging in a doorway at New Year, you have seen its cousin.
1655: a mathematician draws ∞
The symbol itself — the lemniscate, the figure of eight lying down — was invented in 1655 by John Wallis, an English clergyman and mathematician, in a treatise on conic sections. He needed a sign for a quantity larger than any number and simply chose one. Nobody is certain why he chose that shape. The most likely answer is that he adapted the old Roman way of writing a thousand, CIↃ, which was sometimes used to mean "very many"; another is that he took the last letter of the Greek alphabet, omega, and closed it. Either way, for two centuries it stayed on the blackboard. Mathematicians used it; nobody wore it.
1858: the strip with one side
Two hundred years after Wallis, two German mathematicians, August Möbius and Johann Listing, independently discovered that a strip of paper given a half-twist and joined into a loop has only one side and one edge. Run your finger along it and you come back to where you started having touched both "sides" without ever crossing an edge. The Möbius strip is the infinity symbol made solid, and it is why so many modern infinity rings and bangles are given a half-twist: the twist is the point. It turns a flat drawing into an object you can travel round for ever.
How it became a bracelet
The infinity symbol arrived in jewellery late and all at once. Through the twentieth century it appeared occasionally — on a tarot card, on a mystic's pendant — but it was the 2000s and 2010s that made it a staple, and the reason is telling. It was the decade of the friendship bracelet, the sister bracelet, the mother-and-daughter set, and those pieces needed a symbol that meant a bond rather than romance. The heart was taken. The infinity sign — two loops joined at a single point, neither one complete without the other — was perfect. It could be a pendant, but it was even better as a connector: a link that physically joins the two ends of a cord or chain, so that the meaning and the mechanism are the same thing. That is the form of the piece in this guide, a smooth flowing lemniscate with a bar at each end, made to be the join in a bracelet.
What the infinity symbol means when you wear it
The first meaning is the obvious one: without end — a love, a friendship, a memory that does not run out. But the shape carries two more that the ouroboros and the endless knot give it. It is return: whatever leaves comes back round. And it is balance: two equal loops, one crossing, neither dominant. That is why it works for two people who are equals — sisters, best friends, partners — rather than for a giver and a receiver. And in the JewelHub JewelSystem™, where a bracelet is built from links that connect and a story that grows, an infinity connector is the most literal piece there is: it is the join. Other symbols and their readings are on the JewelMotif hub and in the 100 motifs guide.
Free hands-on material sets, UK postage free
Learn zinc from steel in your hand, not on a screen.
⚙️ Zinc Alloy vs Stainless Steel: Which One Can Mean Forever?
An infinity link is a hard-working shape. It is a connector, so it is pulled, twisted and rubbed against the cord every time the bracelet is put on or taken off, and the crossing point in the middle is where a plated finish wears first. That makes it the sharpest possible test of the two metals.
🧷 The same two metals in objects you handle every day
| Object | Usual metal | What that tells you |
|---|---|---|
| Zip slider and pull tab | Die-cast zinc alloy, plated | Cheap crisp detail; the colour is a coating |
| Belt buckle, bag clasp, sunglasses hinge | Die-cast zinc alloy, plated | Look at the hinge of an old pair — the worn edge is the plating gone |
| Jeans button and rivets | Brass or zinc alloy, plated | Volume and cost |
| Car door handle, bathroom tap body | Zinc alloy or brass, chrome-plated | Where chrome flakes, the base metal shows through grey |
| House key | Nickel-plated brass | A plated base metal, and a common nickel-allergy trigger |
| UK 5p and 10p coins | Nickel-plated steel | Since 2011–12; they stick to a magnet |
| Cutlery | Stainless steel, solid | Dishwasher every day for twenty years |
| Watch case back and bracelet | 316L stainless steel | Sits on skin for years, sweat and all |
| Piercing bars and studs | 316L / implant-grade steel or titanium | Chosen for the lowest nickel release of any common metal |
| JewelHub stainless steel infinity link | Stainless steel, solid throughout | Same metal at the crossing point on day one thousand |
The rule is consistent: cast and coated for cheap detail, solid stainless for anything that must live on skin or take strain. A connector takes strain.
📊 Side by side
| Property | Zinc alloy (Zamak) | Stainless steel (304 / 316L) |
|---|---|---|
| What it is | Zinc with about 4% aluminium and traces of magnesium and copper | Iron with 16–18% chromium and 8–14% nickel; 316L adds 2–3% molybdenum |
| How an infinity link is made in it | Poured molten at about 385°C into a die; smooth curves come out flawless | Cast at over 1,400°C, or cut and polished from bar — slower and dearer |
| The colour you see | A plated skin: silver, rhodium, gold, rose gold | The metal itself |
| Strength as a connector | Soft; a thin bar can bend or snap at the crossing | Hard; holds its shape under daily pull |
| Density | About 6.6 g/cm³ | About 8.0 g/cm³ — noticeably heavier |
| Sound when tapped | Dull thud | Clear ring |
| Magnet test | Never magnetic | Usually a gentle pull |
| Water, sweat, perfume | Wears the plating at the crossing; zinc beneath dulls, then goes chalky or green | Chromium oxide layer repairs itself |
| Skin sensitivity | Depends on the plating — insist on nickel-free | Nickel locked in the alloy; the piercing-grade choice |
| Lifespan as jewellery | A season to a few years | Decades |
| Where JewelHub uses it | ZincJewel™ and detailed MiniCharm™ charms | FortunaLink™ links, chains and connectors built to be worn daily |
❓ Your Questions, Answered
My infinity bracelet went dull at the crossing point. Why there?
Because the crossing is where the two loops meet and where the link rubs against the cord, your wrist and itself. On a plated zinc alloy piece that is where the plating wears through first; underneath, the zinc and copper in the alloy react with sweat and air and turn grey, then chalky, sometimes green. A stainless steel link has no plating to wear, so the crossing stays the same colour as the rest. The tarnish guide goes deeper.
Is zinc alloy jewellery bad?
No — it is the same alloy family as your zip and your buckle, safe and well understood. It takes detail beautifully and costs little. The only problem is dishonesty: a plated zinc link sold as "silver" or "forever". Buy it labelled, keep it dry, and it is good jewellery for a good price. The zinc alloy explainer covers what it is and is not.
Is stainless steel strong enough to be the join in a bracelet?
It is the metal watch bracelets are made from, and those are opened and closed several times a day for years. A stainless steel infinity connector will outlast the cord it is tied to. Zinc alloy connectors are fine for light wear, but a thin bar at each end can bend under repeated pull and, once bent, is very hard to straighten without snapping.
How do I tell which metal my infinity piece is?
Magnet: stainless steel usually gives a gentle pull; zinc alloy gives none. Sound: tap it on a mug — steel rings, zinc thuds. Weight: in the same shape, steel is about a fifth heavier. The crossing: on a plated piece it is the first place to change colour. The full method is in the metal identification guide; if the magnet result worries you, the magnetism explainer will settle it.
I am buying matching infinity bracelets for me and my sister. Which metal?
Stainless steel, and for a reason beyond durability. Matching pieces are meant to stay matching, and two plated zinc bracelets worn by two different people wear at two different rates — within a year one is bright and one is grey. Two steel bracelets stay the same as each other for as long as you both wear them. That is rather the point of the symbol.
Can I shower and sleep in it?
Stainless steel: yes to both, for years. Zinc alloy: sleep yes, shower no — water finds the plating's edge at the crossing first. Drying a zinc piece after wear and giving it a soft cloth once a week roughly doubles its life. The zinc care card and stainless steel care card on JewelCare are one screen each.
Why does JewelHub make anything in zinc alloy if steel lasts longer?
Because the right metal depends on the shape. A tiny detailed charm — a bear's face, a flower with countable petals — is a casting job, and casting is what zinc does best. A connector that takes strain is a steel job. So the range uses both, labels every piece by metal, and lets the price follow. That is what smart luxury means: the honest metal for the job.
What is in the Infinity Material Set?
The same smooth infinity pendant in two metals — one zinc alloy on a black cord, one stainless steel on a chain — so you can wear them on alternate days and watch how each one ages. It sits in the JewelFreebies™ range beside the Spiral and Heart sets; thirty sets a month, free postage within the UK, postage elsewhere added at checkout. See the Infinity Pendant Material Set →
📚 More on Jewellery Materials
Other metals, one guide each:
- 925 silver: what the hallmark means, sterling silver vs silver-plated and how to care for it
- 14k and 18k gold: 14K vs 18K gold and gold care
- Stainless steel: why it outlasts other metals
- Copper: what copper jewellery is
- Jade: jade care card
Not sure which is which? Start with the materials glossary, then read everyday jewellery materials or which material to gift.
Same series: the Spiral guide and the Heart guide ask the same zinc vs steel question. More on infinity and other symbols: JewelMotif.
JewelFreebies™ · 30 a month · UK postage free
Learn the metal in your hand — free
Two identical charms, two different metals, and the only variable is the material. No purchase needed. One set per household, UK delivery addresses.
See the free sets →Want a bracelet that really is built to last? Start with a FortunaLink™ stainless steel foundation.
💬 Final Thought
The infinity symbol was drawn by a mathematician who needed a sign for "more than you can count". Three and a half centuries later it is worn by people who need a sign for "more than I can say". Both are promises, and a promise deserves a metal that can keep it. Wear the symbol. Choose the steel. And the next time your zip pull turns grey, you will know exactly why the bracelet didn't.
