A Diamond Is Forever. The Lie Lasted Almost as Long.
The moment you buy a diamond engagement ring and walk out of the shop, it has already lost approximately
“A diamond is forever. The lie lasted almost as long.”
The moment you buy a diamond engagement ring and walk out of the shop, it has already lost approximately half its value. Not over time. Immediately. The retail markup on a diamond averages 100 percent above wholesale. The diamond you paid four thousand dollars for is worth two thousand the moment it belongs to you. If you try to sell it back, buyers offer only a fraction of what you paid, if they make an offer at all.
Diamonds do neither, because the diamond myth runs deeper than most people are ever told. Diamonds are not rare. They never were.
In 1888, a British Businessman Named Cecil Rhodes Built a Cartel
The problem was simple. There were a lot of diamonds. Far too many diamonds. If the market knew how many existed, the price would collapse overnight. The solution was equally simple: control the supply. Release only what the market could absorb. Lock everything else in vaults.
From 1888 until the start of the 21st century, De Beers controlled 80 to 85 percent of rough diamond distribution worldwide. It was a cartel, operating in plain sight, buying up competitors, stockpiling inventory, and punishing any producer who tried to sell outside the approved channel.
Only a select few sightholders could purchase rough stones, and only at De Beers’ set prices. If you wanted access, you took what you were given, at the price you were given, and you kept your mouth shut. If you tried to sell independently, De Beers would flood the market with diamonds identical to yours, crater your price, and wait for you to come back.
The US Department of Justice filed an antitrust lawsuit against De Beers in 1945, arguing the cartel brought diamond prices to arbitrary and exorbitant levels by releasing only part of its stock at a time. De Beers operated entirely outside US territory. The DOJ could file. They could not enforce.
The cartel was not subtle. It was simply beyond reach.
The Copywriter Who Invented a Tradition That Never Existed
The diamond myth was not built on geology. It was built on four words written by a woman named Frances Gerety at the advertising agency N.W. Ayer in 1947. De Beers had diamonds. A lot of diamonds. They needed people to want them. Not just wealthy people. Everyone. The working man. The factory worker. The immigrant saving for his wedding.
Diamonds, at that point, had no particular cultural meaning. They were expensive stones worn by wealthy people. There was no tradition of the diamond engagement ring. That tradition did not exist. It had to be invented.
Gerety wrote four words.
A diamond is forever.
Diamonds were positioned as the only acceptable engagement ring. The campaign suggested that stone size reflects the depth of feeling. It also tapped into status anxiety and turned it into a purchase decision. The advertising industry later named it the most effective marketing campaign of the entire twentieth century.
Gerety, who reportedly never married, found it quietly ironic that her most famous work was about love and diamonds. The woman who invented the tradition never lived by it.
A copywriter working for a cartel sitting on billions of dollars of stones invented a cultural tradition that billions of people now believe is ancient. The diamond engagement ring is not a tradition. It is the diamond myth, packaged as romance, sold as necessity.
The Two-Months Salary Rule Was Not Tradition. It Was a Sales Target.
De Beers invented the two-months salary guideline.
Not a tradition. Not a rule. A suggested spend, promoted through advertising. Spend two months of your salary on a ring and it proves how much you love her. The guideline made the purchase relative. It did not matter if you could not afford a large stone. What mattered was the proportion of your income you were willing to sacrifice. A working man spending two months of a modest salary was performing the same devotion as a wealthy man spending two months of a large one.
Buying a diamond stopped being about jewellery. It became about proving your worth. Men went into debt. De Beers sold the stones sitting in its vaults. They reinforced the tradition year by year, generation by generation, until people believed it had always existed.
What De Beers Could Not Control Was Geology
In the 1950s, the Soviet Union discovered vast diamond deposits in Siberia. Then Australia. Then Canada. Each new discovery threatened to flood the market with supply De Beers did not own.
The Soviet arrangement lasted for decades, an uneasy alliance where Russia needed hard currency and De Beers needed the supply to stay off the open market. When the Soviet Union collapsed in the early 1990s, that arrangement went with it.
Shortly after, the Argyle Mine in Australia broke away from De Beers. Canadian mines followed. By the end of the 1990s, De Beers’ market share had fallen from 90 percent to less than 60 percent.
In 2001, plaintiffs filed lawsuits in US courts alleging that De Beers unlawfully monopolised diamond supply, conspired to fix prices, and ran false and misleading advertising. In 2012, the parties finalised a settlement approaching 300 million dollars, bringing an end to the cartel as it had operated for over a century.
Lab-Grown Diamonds and the Final Chapter of the Diamond Myth
Diamonds were positioned as the only acceptable engagement ring. The campaign suggested that stone size reflects the depth of feeling. It also tapped into status anxiety and turned it into a purchase decision.
De Beers’ entire business model rested on one premise: diamonds are desirable because they are scarce. Lab-grown diamonds killed that premise. They are not scarce. They can be produced at will. And they are physically indistinguishable from the stones sitting in De Beers’ vaults.
The industry’s counter-argument was that natural diamonds are a store of value, that they appreciate and hold worth. The numbers do not hold. Average retail markup is 100 percent above wholesale. You lose half the value walking out of the shop. Lab-grown diamonds are a third of the price and the gap is widening as production scales.
The generation that was supposed to inherit the tradition created in 1947 is refusing it. Not out of sentiment. Out of information.
The Diamond Myth Was Never About Diamonds
The story is not about stones.
It is about a cartel that controlled a market for over a century by keeping the supply locked in vaults. About a copywriter who invented a cultural tradition that spread globally. A marketing rule disguised as a romantic gesture pushed men into debt for a product that lost half its value the moment they purchased it.
De Beers did not sell diamonds. They sold the idea that diamonds mean love, that stone size measures the depth of feeling, and that the tradition is ancient, even though they created it on Madison Avenue seventy-eight years ago.
The stone is not rare. There are billions of them in vaults right now, released in quantities calculated to maintain the price. The tradition was an advertisement. The two-months rule was a sales strategy.
A cartel locked diamond supply in vaults, a copywriter invented a cultural tradition overnight, and a guilt-based spend guideline targeted working-class men. Together, these three forces reinforced each other for nearly a century.
Knowing this does not change how the ring on someone’s finger feels. But it does change what you are looking at when you see it.
A diamond is forever. The diamond myth almost was too.
Sources
- Paul Zimnisky — A Brief History of De Beers
- Harvard Business School — From Rock to Ring: De Beers’ Diamond Cartel
- Susan Blake Jewelry — How De Beers Shaped and Still Controls the Diamond Market
