The page we least want to write
We sell lab-grown and natural diamonds, and much of this site argues that lab-grown suits most budgets better. That makes this the one page where our own argument and a fair hearing for the other side pull hardest in opposite directions, and writing it as though that were not true would be worse than not writing it at all. So here is the arrangement. Every objection below is put in its strongest form first, in the words of the person making it, before we say anything back. Where we think the objection is right, we say so and leave it standing.Two questions bring people here, and they are not the same question. Why do jewellers not like lab-grown diamonds is mostly a question about the shape of a retail business. Why do people not want lab diamonds is mostly about resale, family and timing. The answers point in different directions, so they get separate sections.One thing to clear away first. Almost none of the serious objections are gemmological. After twenty years of grown stones in the trade, nobody credible argues that a lab-grown diamond is a worse crystal, and the sales lines about clouding and lost sparkle are contradicted by the material itself. The real arguments are about money, meaning and disclosure, and they are better arguments than the ones usually made on their behalf.
What to assume about us while you readWe sell both origins, but we have spent a lot of this site arguing for lab-grown. Read the verdicts with that in mind, and notice how many of them go against that argument. If we wanted the easy version of this page, five of the nine objections below would not be marked fair.
Every objection, with our verdict
Nine objections, sorted by who raises them rather than by how much we like them. The verdict on the right is ours and is meant to be argued with.Read the verdict column on its own and the pattern is hard to miss. Everything we accept is about money, supply chains or meaning. Nothing we accept is about the diamond. That is the honest shape of this subject, and it is also why the trade argument and the buyer argument have to be untangled: they are answering different worries with the same sentence.
The case against lab-grown, and how much of it we accept
Jewellers
Fair
“I am holding natural stock that is worth less every month.”
The case at its strongestA jewellery shop buys inventory long before anyone wants it. Stones sitting in the safe were bought at the cost of the year they arrived, and natural polished prices have come down hard from their 2022 peak while the lab-grown price collapse dragged what customers expect to pay down with it. That is a loss on stock already paid for, and no amount of selling fixes it.
Our answerCorrect, and it is the objection we respect most, because it is honest about being a claim on the shop rather than on the stone. It is also the one almost never said out loud to a customer.
Jewellers
Fair
“There is not enough margin in them to run a shop on.”
The case at its strongestTake the same gross margin percentage on a natural ring and a lab-grown ring and the dollars are not close, because the ticket price is not close. Rent on a retail lease, insurance, a qualified bench jeweller and a valuer are all paid in dollars per sale. A shop that used to clear a few thousand on a solitaire now clears several hundred, and has to sell several times as many rings to stand still.
Our answerTrue, and it explains most of the behaviour people read as snobbery. It is still a fact about a cost base rather than about a diamond, and a business model is not an argument.
Jewellers
Partly fair
“A stone grown in a fortnight is not the same thing as one that took a billion years.”
The case at its strongestA customer paying for a natural diamond is buying age and improbability along with the carbon. That is not a trick: it is what the price has always been for. Cartier's chief executive put it as plainly as anyone in the trade has managed, and if rarity is the product, then a reactor cannot supply it at any grade.
Our answerRight about meaning, wrong the moment it is smuggled in as a claim about quality. If you want the stone to be old, buy an old one and we will tell you so. What the argument also concedes is that the mined premium is a story, which is a fragile thing to build a shop on.
Jewellers
Fair
“Resale is terrible and I am the one who gets blamed for it.”
The case at its strongestA customer comes back in eight years wanting to trade up, or after a divorce, and finds out the ring is worth the gold and nothing else. They do not blame the market. They blame the person who sold it to them, in a review, in a suburb where the shop has traded for thirty years.
Our answerThis is the strongest honest objection in the set and we do not have a clever answer to it. Our answer is to say the resale number out loud before the sale rather than after, which is why it is in our downsides guide and in this paragraph.
Jewellers
Fair
“Undisclosed grown stones are getting into my melee.”
The case at its strongestSmall stones for pavé and halos move in parcels of hundreds, priced by weight, passing through several hands. Undisclosed laboratory-grown melee has turned up in those parcels, and a jeweller who unknowingly sets it has misdescribed a customer's ring. Screening machines that catch it are a serious capital purchase for an independent, and every parcel then costs time on the bench as well.
Our answerReal, documented, and a cost the growing industry created and largely does not pay. It is a genuine grievance about supply-chain hygiene. It says nothing about a certified, inscribed, disclosed centre stone, which is what you are actually buying.
Buyers
Not fair
“It is not a real diamond.”
The case at its strongestThe intuition is that a manufactured version of a natural thing is a copy of it, and that we have a word for copies. Nobody wants to be the person who bought the copy.
Our answerIt is a diamond. Same carbon, same lattice, same hardness, graded by the same laboratories, and no jeweller alive can pick it out of a tray by eye. The word is settled in law too, in the United States and here. What is not the same is where it came from, and that has to be disclosed.
Buyers
Partly fair
“The price keeps falling, so I am buying at the wrong moment.”
The case at its strongestWholesale lab-grown prices have fallen every year since 2018 and there is no sign of a floor beyond the cost of the electricity. Paying full retail today for something that will be cheaper next Christmas feels like a mistake even when the ring is beautiful.
Our answerFair as a feeling and weak as arithmetic, because a natural ring loses most of its retail value the moment you carry it out of the shop as well. The falling price is a reason to spend less on the stone and more on the making, not a reason to spend five times as much on a different stone.
Buyers
Fair
“The environmental case for lab-grown is oversold.”
The case at its strongestGrowing diamond takes a great deal of electricity, most of the world's production is in China and India, and a large share of that power is coal-fired. Carbon-neutral claims often rest on offsets rather than on the grid the reactor is plugged into, and nobody audits the marketing.
Our answerCorrect, and we do not run the environmental line as a reason to buy from us. Mining has a footprint of its own, in earth moved and water used, so neither side gets to claim clean hands. Buy lab-grown for the stone you get for the money, not for a carbon figure.
Families
Partly fair
“Her mother will know, and will have views.”
The case at its strongestThe ring is worn in front of specific people for decades. If the people whose opinion your partner cares about think a grown diamond is a shortcut, that opinion arrives at every Christmas lunch, and no amount of gemmology settles it.
Our answerA real cost, and one we will not talk anyone out of. It is imposed by the room rather than by the stone, and it is fading, but if it applies to your family it belongs in the decision next to the price.
Verdicts are ours. The wholesale price fall is De Beers' own figure, given when it closed its Lightbox brand in May 2025: about 90 per cent down at wholesale since 2018. Undisclosed laboratory-grown melee entering natural parcels has been reported by GIA, IGI and the trade press since the mid 2010s, and De Beers has sold screening instruments to jewellers over the same period. Adoption figures elsewhere in this guide are from The Knot's Real Weddings study of United States couples; no Australian survey of comparable size is published.
Where a jeweller's money actually sits
Start with the version nobody says across a counter, because it is the one that explains the most behaviour. A jewellery shop does not pay its rent in percentages. It pays in dollars, and the dollars per sale are what lab-grown changed.Here are three sales drawn against the same money. The margin percentage is identical in all three, which is the point: nothing in this picture requires a jeweller to be greedy or a stone to be inferior.
One sale, three ways, drawn against the same dollarsAustralian dollars for a finished ring, at a flat 30 per cent gross marginA worked illustration rather than survey data: we have held the margin percentage constant on purpose so the dollar gap is the only thing moving. No Australian survey of jewellery retail margins is published, and real gross margins vary widely by shop and by whether the stone is held in stock or ordered in. Retail figures sit in the range our own Australian pricing guides use for a well-cut one carat solitaire in 18ct gold.
The gold band on the bottom row is roughly a third the length of the one on the top row, at the same percentage. A shop that used to clear a few thousand dollars on a solitaire now clears several hundred, and has to sell three or four rings to stand where one used to leave it. Meanwhile the bench jeweller, the valuer, the insurance and the lease cost exactly what they cost before.The middle row is the part people underestimate, and it is inventory risk. Retail jewellery runs on stock bought long before anyone wants it, so a safe full of natural stones is a bet placed at the cost of the year they were bought. Natural polished prices have fallen a long way from their 2022 peak, and the collapse in lab-grown pricing pulled down what customers think a big stone should cost. A retailer in that position is watching an asset they have already paid for get marked down while a cheaper alternative walks through the door. Being cross about that is not irrational.Natural one carat solitaire, 18ct gold$9,000 on the ticket
The sale a traditional shop was built around.$2,700 gross, 30 per cent
The same natural ring, stone bought two years ago, discounted to move$7,200 on the ticket
Nothing changed except the price the market will bear.$900 gross, 13 per cent
Lab-grown one carat solitaire, 18ct gold$3,000 on the ticket
Same margin percentage, roughly a third of the dollars.$900 gross, 30 per cent
What the shop paid
Gross margin, in dollars
The tellYou can hear which objection you are getting by what comes next. “I cannot make a living on them” is true, specific, and deserves respect. “They go cloudy” is a sales line. A jeweller who gives you the first version is being straight with you and is probably worth buying a natural ring from.
The reason given, and the reason underneath
Most of what customers report back to us from other counters is not the margin argument. It is one of six lines, and each has something real behind it that would be more persuasive if it were said directly.
Six things said across a counter, and what is usually driving themThe left column is what customers tell us they were told while shopping elsewhere, not a survey, and plenty of Australian jewellers say none of it. The right column is our reading of it, and we are not a neutral party.
The last two are worth sitting with, because they are honest and they are still not reasons for you to change your mind. A shop that stocks natural because its customers buy natural has told you something true about its business. A jeweller who would not spend their own money on a grown stone has told you something true about a person with a trade discount and a wholesale contact, which is not your situation.What gets said“They cloud over and go yellow after a few years.”
What is usually behind itNothing in a diamond can fade, and this one is simply false. What is falling is the price of a new one, which is a problem for a safe full of stock rather than for a ring on a hand.
What gets said“They have no resale value.”
What is usually behind itLargely true, and usually said sincerely. It is also true of the natural stone in the next tray, at a difference of degree rather than of kind, and the jeweller rarely mentions that part.
What gets said“They are not real diamonds.”
What is usually behind itThey are, on every standard that governs the word. What the seller means is that they are not scarce, which is a statement about price rather than about the crystal.
What gets said“Nobody really wants them.”
What is usually behind itMost couples now choose one. Trade coverage is dominated by falling prices, and cheap gets reported as failing even while volumes climb.
What gets said“Our customers expect natural, so that is what we stock.”
What is usually behind itOften exactly accurate, and it would be respectable to leave it there. A shop with a mined clientele and a safe full of mined stones cannot turn around in a season.
What gets said“I would not put my own money into one.”
What is usually behind itProbably honest, and beside the point. A jeweller with a trade discount and a wholesale contact is not the person choosing between a compromised one carat and a well-cut two on an ordinary budget.
The rarity argument, taken seriously
The best version of the case against lab-grown has nothing to do with carbon. It is that the price of a diamond was never about how the stone performs in light. It was about age and improbability, and a customer paying for those is buying something a reactor cannot make at any grade. Cartier's chief executive gave the cleanest statement of it anyone in the trade has managed.
The second quote is the more revealing of the two. De Beers built a lab-grown brand in 2018 specifically to define grown stones as cheap and non-bridal, priced flat by the carat, and closed it in 2025 having proved the point rather too well.Which is why we treat the rarity objection as a matter of taste rather than a matter of fact. If it moves you, it should decide your purchase. It should not be dressed up as gemmology, and where the famous houses stand on it is a story about brand architecture, which we go through in our guide to why Tiffany says no.
The objection in the words of the trade
We concede the first quote almost entirely. If what you want on the hand is a stone that existed before people did, a grown diamond cannot give it to you, and no amount of arithmetic about carat weight is a substitute. That is a real thing to want and we will happily point you at a natural stone or an antique cut instead.Two problems, though. The first is that the argument keeps getting worn as a claim about quality, which it is not. Rarity is not visible. Nobody looking at your hand across a table is seeing provenance. The second is that the scarcity being defended was manufactured too, just earlier and with advertising rather than methane. Diamonds became the engagement stone because of a campaign that began in 1947 and ran for the better part of eighty years, and the same industry that built the story is now discovering how fragile a price is when it rests on one.“They don't have any history. They were made two days before.”
Cyrille VigneronThen chief executive, Cartier. The State of Fashion: Watches and Jewellery, Business of Fashion and McKinsey, 2021.
“Over the last year, the price of lab-grown has continued to fall sharply. We have now gotten to the point where you can buy lab-grown in supermarkets for $200.”
Al CookChief executive, De Beers, on closing its own lab-grown brand. JCK, 2025.
The strongest objection, and it is resale
If we were arguing the other side, this is the argument we would run, and we would not bother with any of the others. Lab-grown resale is poor, it is getting worse rather than better, and the reason is structural: a dealer can buy a brand new stone of your exact specification for less than a fair price for your used one, and cheaper again next year. So they make no offer at all.This is not a claim we are making against our own product on the quiet. The Jewellers Association of Australia says it on its own consumer page about laboratory-grown diamonds, citing CIBJO, the international body that writes the trade's terminology standards: there is no intrinsic resale value in a lab-grown stone. The industry association our competitors belong to, and the body that defines the words on a grading report, both put that in writing. Anyone selling you one who tells you otherwise is going against their own trade's position.The part that gets missed is the jeweller's own exposure. A shop that sells a lab-grown ring is signing up to be the person a customer comes back to in eight years, when the trade counter offers scrap value for the metal. That conversation lands on the seller, not on the market, and a business that has traded in the same suburb for three decades has good reason to avoid it. That is a legitimate reason to decline to sell something, and it is not the same as claiming the thing is defective.
The resale objection, both sides
We have put the actual recovery figures, both origins on the same money, in our guide to whether a lab-grown diamond is worth buying, and the reason no jeweller will quote on a used one in our guide to the downsides. Neither is comfortable reading and both are more useful than reassurance.What the resale objection gets right
A jeweller can order a brand new, unworn, identically graded stone for less than a fair price for your used one, so there is no offer that works for both of you. This is arithmetic, not attitude.
There is no second-hand lab-grown trade with dealers, auction rooms and published prices, and at current wholesale levels there is no reason for one to appear.
The gap is getting wider rather than narrower, because the replacement cost falls every year while your ring stays the same age.
A buyer who was allowed to believe the ring would hold its value has been misled, and the shop that let them believe it deserves the complaint.
Where it overreaches
It is presented as a difference in kind when it is a difference in degree. A natural solitaire sold to a dealer for cash comes back at a fraction of the retail price too.
It assumes the ring will be sold. Almost nobody sells an engagement ring, and the small number who do are rarely in a position to shop the offer around.
It compares a resale you will probably never test against money you keep on the day, which is the more certain of the two.
It is often deployed by someone with several thousand dollars of natural margin riding on the answer, which is worth knowing while you listen.
Our actual advice on thisAssume the resale value is zero, then decide whether the ring is worth the money anyway. That is the only sane way to buy an engagement ring of any origin, and if you cannot get comfortable with it, do not buy a diamond at all. Buy gold, which is liquid and publicly priced, and spend less on the ring.
Melee, screening and who polices the word
This objection almost never reaches customers and it is the one jewellers talk about among themselves. Small stones are the problem. A halo or a pavé band uses dozens of tiny diamonds bought by weight in parcels, and undisclosed laboratory-grown melee has been found in those parcels for years now. A jeweller who unknowingly sets it has misdescribed somebody's ring, which is their liability rather than the grower's.Catching it takes a screening instrument, which for an independent Australian workshop is a serious capital purchase, and then bench time on every parcel that arrives. The cost of somebody else's dishonesty lands on the person at the bench. When a jeweller tells you lab-grown has made their life harder, this is often what they mean, and they are right.What it does not touch is the stone you are actually considering. A disclosed, certified, inscribed centre diamond is the opposite of the melee problem. The paperwork is the point.The short version is that the word diamond is settled and the origin has to be declared. Anybody telling you a grown stone is not a diamond is arguing with the regulator, and anybody selling you one without saying so on the invoice is breaking the law. Our guide to whether lab-grown diamonds are real goes through who gets to define the term, and telling lab-grown from natural covers what detection actually takes.
Who decides what has to be disclosed, and what each one is worth
United States Federal Trade CommissionConsumer regulator, advertising
Revised its Jewelry Guides in 2018, removing the word natural from the definition of a diamond and treating laboratory-grown stones as diamonds that must be clearly described as laboratory-grown, laboratory-created or grown by a named producer.The reason the word diamond is not in dispute anywhere in the trade, however the argument gets framed at a counter.Australian Competition and Consumer CommissionConsumer regulator, Australia
No Australian rule names lab-grown diamonds specifically. The Australian Consumer Law's ban on misleading or deceptive conduct does the work instead: describing a grown stone as natural, or leaving the origin off an invoice, is a straightforward breach.Weaker on paper than a dedicated standard, and strong enough in practice that no reputable Australian seller conceals origin.Jewellers Association of AustraliaIndustry body, voluntary code
Its code of conduct requires members to disclose laboratory-grown and treated stones. It binds members only, so it is worth asking whether a seller is one.A useful question to ask, not a guarantee you can rely on by itself.IGI and GIAGrading laboratories
Both state origin on the report and both laser inscribe laboratory-grown on the girdle of the stones they certify, so the answer is written on the diamond and readable at ten times magnification.The practical end of disclosure. An inscribed, certified centre stone cannot be passed off as anything else.Positions as published by each body. The Federal Trade Commission's revised Jewelry Guides took effect in 2018. Australia has no diamond-specific standard, so the general prohibition on misleading or deceptive conduct in the Australian Consumer Law carries the weight, and the Jewellers Association of Australia's code binds its members only.
Why some people do not want one
The buyer objections are a different set, and only one of them overlaps with the trade's. Here they are in the order we hear them, which is not the order of how good they are.
The objection people worry about most is the one about family, and it is the only one on the list that gets smaller every year.If you want the version of this argument with the numbers attached, our lab-grown or natural comparison puts what you gain against what you give up, and our tradeoffs guide takes the stigma question on its own.
What Australian buyers tell us when they say no, most common firstOrder reflects what customers say to us rather than a survey; we have not polled anyone, and no Australian study of buyer attitudes at this level of detail exists. The chip on each row is our verdict, not a measurement.
Notice what is missing. Nobody tells us the stone looks wrong, and nobody who has seen two rings side by side under ordinary light comes back to origin as an aesthetic complaint. Every objection on that list is about money, other people, or the meaning of the material. Those are all legitimate grounds to buy natural, and they are all knowable before you spend anything, which is more than can be said for most of what you will be told in a shop.01The most common reason by a wide margin, and correct on its own terms. The catch is that the natural alternative is a poor store of value too, so the honest conclusion is to stop treating either ring as savings rather than to pay five times more for a better exit.
“I want it to be worth something one day.”
Fair, with a catch
02The feeling is real and the premise is not. Same crystal, same chemistry, same hardness, same laboratories, same grading. If the feeling persists after knowing all that, it is a preference for provenance, which is a different and more defensible thing to say.
“It does not feel like a real diamond to me.”
Not fair
03Nobody enjoys paying retail for something on the way down. Worth separating from the question of whether the ring is good: a well-cut two carat in a well-made setting will look the same in 2031 whatever the replacement cost has done.
“The price keeps falling and I do not want to feel like a mug.”
Fair as a feeling
04The one objection where we tell people to trust their own read of the room. Ask yourself who actually gets a vote, and whether they will ever ask. In our experience the number of people who ask is smaller than it feels at three in the morning.
“My partner's family will have opinions.”
Real cost
05You should not. Reactors run on grid electricity, much of it in countries where the grid is coal-heavy, and the carbon-neutral marketing usually rests on offsets. Mining has its own footprint. Neither origin has earned the right to be sold as the green option.
“I do not believe the environmental claims.”
Fair
06A grown diamond has a factory and a date, and that is all it has. If the origin of the material is part of the gift, no argument about hardness or price will replace it, and you should buy a natural stone or an antique one.
“I want the stone to have come from somewhere.”
Fair
07Usually a worry about effort rather than about diamonds: that a cheaper ring says something about how much thought went in. Nothing on a hand communicates budget. What people notice is whether the ring suits the person wearing it.
“It feels like taking a shortcut.”
Worth examining
Where we stand, in plain terms
We sell natural diamonds too, and we still recommend lab-grown to most couples for one reason: at any budget an ordinary Australian couple actually has, it puts a considerably better stone on the hand. A well-cut two carat at G and VS1 instead of a compromised one carat, or the same stone with the money left over going into the setting, the honeymoon or the deposit. That is the whole argument and it does not need any help from a story about the environment or about scarcity.Four of the objections above we think are simply correct. The margin and inventory problem is real, and it is a fact about jewellery retail rather than about your ring. Resale is real and it is the one we would lead with if we were arguing the other side. The melee and screening grievance is real, and the growing industry created it. And the environmental case for lab-grown is oversold, by people who should know better.The rarity objection we treat as taste. If age and provenance are part of what you are giving someone, buy a natural stone, and we would rather tell you that than sell you something you will quietly regret. What we do not accept is any of it as a claim about the diamond: not the clouding, not the sparkle, not the idea that it is a copy of something. On those, the physics has not changed and neither have we.
The one thing we will not tell youThat a diamond is an investment. Not this one, not a natural one, not a certificated one held in a safe. Every ring on the market loses most of its retail value the moment it leaves the shop, and any seller implying otherwise is doing the thing this whole page is about.
Been told not to buy one?Send us what you were told and by whom. We will tell you which parts of it are true, which parts are a sales line, and whether the ring you were shown instead is worth the difference. If the honest answer is that you should buy a natural stone, we will say so and tell you what to look for.
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